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I modified this so it can be used to monitor Canon Imagerunner copiers. Here is the code:

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#!/bin/bash

# check_snmp_printer
# Description : Check the status of a printer
# Version : 1.0
# Author : Yoann LAMY
# Licence : GPLv2

# Commands
CMD_BASENAME="/bin/basename"
CMD_SNMPGET="/usr/bin/snmpget"
CMD_SNMPWALK="/usr/bin/snmpwalk"
CMD_GREP="/bin/grep"
CMD_AWK="/bin/awk"
CMD_EXPR="/usr/bin/expr"

# Script name
SCRIPTNAME=`$CMD_BASENAME $0`

# Version
VERSION="1.0"

# Plugin return codes
STATE_OK=0
STATE_WARNING=1
STATE_CRITICAL=2
STATE_UNKNOWN=3

# Default OID (Printer-MIB)
OID_NAME=".1.3.6.1.2.1.43.11.1.1.6.1"
OID_TOTAL=".1.3.6.1.2.1.43.11.1.1.8.1"
OID_STATUS=".1.3.6.1.2.1.43.11.1.1.9.1"

OID_NAME_OTHER=".1.3.6.1.2.1.43.12.1.1.4.1"
OID_TOTAL_OTHER=".1.3.6.1.2.1.43.10.2.1.9.1"
OID_STATUS_OTHER=".1.3.6.1.2.1.43.10.2.1.10.1"

OID_PAGE=".1.3.6.1.2.1.43.10.2.1.4.1.1"

# Default variables
DESCRIPTION="Unknown"
STATE=$STATE_UNKNOWN

# Default options
COMMUNITY="public"
HOSTNAME="127.0.0.1"
TYPE="page"
CONSUMMABLE="black"
WARNING=0
CRITICAL=0

# Option processing
print_usage() {
echo "Usage: ./check_snmp_printer -H 127.0.0.1 -C public -t consummable -o black -w 85 -c 90"
echo " $SCRIPTNAME -H ADDRESS"
echo " $SCRIPTNAME -C STRING"
echo " $SCRIPTNAME -t STRING"
echo " $SCRIPTNAME -w INTEGER"
echo " $SCRIPTNAME -c INTEGER"
echo " $SCRIPTNAME -h"
echo " $SCRIPTNAME -V"
}

print_version() {
echo $SCRIPTNAME version $VERSION
echo ""
echo "The nagios plugins come with ABSOLUTELY NO WARRANTY."
echo "You may redistribute copies of the plugins under the terms of the GNU General Public License v2."
}

print_help() {
print_version
echo ""
print_usage
echo ""
echo "Check the status of the printer"
echo ""
echo "-H ADDRESS"
echo " Name or IP address of host (default: 127.0.0.1)"
echo "-C STRING"
echo " Community name for the host's SNMP agent (default: public)"
echo "-t STRING"
echo " Check type (consummable, page) (default: page)"
echo "-o STRING"
echo " Consummable (BL,CY,MG,YE,WT,BD,CD,MD,YD,FU,AM) (default: black)"
echo "-w INTEGER"
echo " Warning level for consummable in percent (default: 0)"
echo "-c INTEGER"
echo " Critical level for consummable in percent (default: 0)"
echo "-h"
echo " Print this help screen"
echo "-V"
echo " Print version and license information"
echo ""
echo ""
echo "This plugin uses the 'snmpget' command and 'snmpwalk' command included with the NET-SNMP package."
echo "This plugin support performance data output."
echo "If the percentage of the warning level and the critical level are 0, then the script returns a state OK."
}

while getopts H:C:t:o:w:c:hV OPT
do
case $OPT in
H) HOSTNAME="$OPTARG" ;;
C) COMMUNITY="$OPTARG" ;;
t) TYPE="$OPTARG" ;;
o) CONSUMMABLE="$OPTARG" ;;
w) WARNING=$OPTARG ;;
c) CRITICAL=$OPTARG ;;
h)
print_help
exit $STATE_UNKNOWN
;;
V)
print_version
exit $STATE_UNKNOWN
;;
esac
done

# Plugin processing
if [ $TYPE = "consummable" ]; then
# Check the consummable of the printer (Usage : ./check_snmp_printer -H 127.0.0.1 -C public -t consummable -o BL -w 85 -c 90)
CONSUMMABLE_NAME=$CONSUMMABLE

if [ $CONSUMMABLE = "black" ]; then
CONSUMMABLE_NAME="black\|cartouche\|toner"
fi
if [ $CONSUMMABLE = "BL" ]; then
CONSUMMABLE_ID="1"
fi
if [ $CONSUMMABLE = "CY" ]; then
CONSUMMABLE_ID="2"
fi
if [ $CONSUMMABLE = "MG" ]; then
CONSUMMABLE_ID="3"
fi
if [ $CONSUMMABLE = "YE" ]; then
CONSUMMABLE_ID="4"
fi
if [ $CONSUMMABLE = "WT" ]; then
CONSUMMABLE_ID="5"
fi
if [ $CONSUMMABLE = "BD" ]; then
CONSUMMABLE_ID="6"
fi
if [ $CONSUMMABLE = "CD" ]; then
CONSUMMABLE_ID="7"
fi
if [ $CONSUMMABLE = "MD" ]; then
CONSUMMABLE_ID="8"
fi
if [ $CONSUMMABLE = "YD" ]; then
CONSUMMABLE_ID="9"
fi
if [ $CONSUMMABLE = "FU" ]; then
CONSUMMABLE_ID="10"
fi
if [ $CONSUMMABLE = "AM" ]; then
CONSUMMABLE_ID="11"
fi


if [ -n "$CONSUMMABLE_ID" ]; then
CONSUMMABLE_TOTAL=`$CMD_SNMPGET -t 2 -r 2 -v 1 -c $COMMUNITY -Ovq $HOSTNAME ${OID_TOTAL}.${CONSUMMABLE_ID}`
CONSUMMABLE_STATUS=`$CMD_SNMPGET -t 2 -r 2 -v 1 -c $COMMUNITY -Ovq $HOSTNAME ${OID_STATUS}.${CONSUMMABLE_ID}`

if [ ${CONSUMMABLE_TOTAL: 0:1} = "-" ]; then
CONSUMMABLE_TOTAL=`$CMD_SNMPGET -t 2 -r 2 -v 1 -c $COMMUNITY -Ovq $HOSTNAME ${OID_TOTAL_OTHER}.${CONSUMMABLE_ID}`
CONSUMMABLE_STATUS=`$CMD_SNMPGET -t 2 -r 2 -v 1 -c $COMMUNITY -Ovq $HOSTNAME ${OID_STATUS_OTHER}.${CONSUMMABLE_ID}`
fi

if [ -n "$CONSUMMABLE_TOTAL" ] && [ -n "$CONSUMMABLE_STATUS" ]; then

CONSUMMABLE_POURCENT=`$CMD_EXPR \( $CONSUMMABLE_STATUS \* 100 \) / \( $CONSUMMABLE_TOTAL \)`
CONSUMMABLE_USED_POURCENT=`$CMD_EXPR 100 \- $CONSUMMABLE_POURCENT`

if [ $WARNING != 0 ] || [ $CRITICAL != 0 ]; then

if [ $CONSUMMABLE_USED_POURCENT -gt $CRITICAL ] && [ $CRITICAL != 0 ]; then
STATE=$STATE_CRITICAL
elif [ $CONSUMMABLE_USED_POURCENT -gt $WARNING ] && [ $WARNING != 0 ]; then
STATE=$STATE_WARNING
else
STATE=$STATE_OK
fi
else
STATE=$STATE_OK
fi

case "$CONSUMMABLE" in
black)
CONSUMMABLE_NAME="of the black cartridge"
;;
cyan)
CONSUMMABLE_NAME="of the cyan cartridge"
;;
magenta)
CONSUMMABLE_NAME="of the magenta cartridge"
;;
yellow)
CONSUMMABLE_NAME="of the yellow cartridge"
;;
drum)
CONSUMMABLE_NAME="of the printing device"
;;
*)
CONSUMMABLE_NAME="of the consummable"
esac

DESCRIPTION="Utilisation $CONSUMMABLE_NAME : ${CONSUMMABLE_USED_POURCENT}% | cons_used=${CONSUMMABLE_USED_POURCENT};$WARNING;$CRITICAL;0"
else
DESCRIPTION="Printer is waiting"
fi
fi
elif [ $TYPE = "page" ]; then
# Check page number of the printer (Usage : ./check_snmp_printer -H 127.0.0.1 -C public -t page)
PAGES=`$CMD_SNMPGET -t 2 -r 2 -v 1 -c $COMMUNITY -Ovq $HOSTNAME $OID_PAGE`
if [ -n "$PAGES" ]; then
DESCRIPTION="Page number : $PAGES | pages=$PAGES;0;0;0"
STATE=$STATE_OK
fi
fi

echo $DESCRIPTION
exit $STATE