Matt: CB operates on (I think) 27 mhz and 980 mhz bands (someone correct me if I'm wrong) but the VHF Aeronautical Mobile band is from 108 to 137 mhz plus some military use 142 mhz. There is also a UHF band used by the military which is something like roughly 230 to 400 mhz.
Many recievers are available which work on 108 - 137, but try
Flight Equipment | Pilot Supplies | Pilot Shop | Aviation Headsets for a specialist one.