Monitoring Aironet 350 Bridge Link Signal Strength

Hello,
Does anyone have ideas/examples on using SNMP to query 350 series bridges to obtain running data on signal strength & quality? I would like to use something like MRTG to monitor signal strength, along with link usage.
Looking through the MIB files (especially ftp://ftp.cisco.com/pub/mibs/v2/AWCVX-MIB.my)
it looks like awcDot11TpFdbLatestRxSignalStrength is what I'm after, however I cannot see how to properly reference this. When I walk the tree from 1.3.6.1.4.1.522.3.12 it doesn't seem to list the relevant values.
Any help/advice most appreciated!
Thanks,
Ben Trigger

PS - when I walk the tree i get the following:
snmpwalk -c public 172.16.0.2 1.3.6.1.4.1.522.3.12
SNMPv2-SMI::enterprises.522.3.12.1.1.0 = INTEGER: 10
SNMPv2-SMI::enterprises.522.3.12.1.3.0 = INTEGER: 2
SNMPv2-SMI::enterprises.522.3.12.1.5.0 = INTEGER: 0
SNMPv2-SMI::enterprises.522.3.12.1.7.0 = INTEGER: 0
SNMPv2-SMI::enterprises.522.3.12.1.8.0 = INTEGER: 0
SNMPv2-SMI::enterprises.522.3.12.1.9.0 = INTEGER: 1
SNMPv2-SMI::enterprises.522.3.12.1.10.0 = INTEGER: 1
SNMPv2-SMI::enterprises.522.3.12.1.11.0 = INTEGER: 0
SNMPv2-SMI::enterprises.522.3.12.1.12.0 = INTEGER: 0
SNMPv2-SMI::enterprises.522.3.12.1.13.0 = INTEGER: 0
SNMPv2-SMI::enterprises.522.3.12.1.14.0 = INTEGER: 0
SNMPv2-SMI::enterprises.522.3.12.1.15.0 = INTEGER: 1
SNMPv2-SMI::enterprises.522.3.12.1.16.0 = INTEGER: 0
SNMPv2-SMI::enterprises.522.3.12.2.1.0 = INTEGER: 8192
SNMPv2-SMI::enterprises.522.3.12.2.2.0 = Gauge32: 300
SNMPv2-SMI::enterprises.522.3.12.2.3.0 = Gauge32: 28800
SNMPv2-SMI::enterprises.522.3.12.2.4.0 = Gauge32: 1800
SNMPv2-SMI::enterprises.522.3.12.2.5.0 = Gauge32: 1800
SNMPv2-SMI::enterprises.522.3.12.2.6.0 = Gauge32: 1800
SNMPv2-SMI::enterprises.522.3.12.2.7.0 = Gauge32: 28800
SNMPv2-SMI::enterprises.522.3.12.2.8.0 = Gauge32: 28800
SNMPv2-SMI::enterprises.522.3.12.2.9.0 = Gauge32: 28800
SNMPv2-SMI::enterprises.522.3.12.2.10.0 = Gauge32: 28800
SNMPv2-SMI::enterprises.522.3.12.2.11.0 = INTEGER: 1
SNMPv2-SMI::enterprises.522.3.12.2.12.0 = INTEGER: 2
SNMPv2-SMI::enterprises.522.3.12.2.13.0 = INTEGER: 30
SNMPv2-SMI::enterprises.522.3.12.2.14.0 = INTEGER: 2

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