Repco have a special on Oricom branded UHF 40CH 477mhz PRS (not the cb the truckies use) radios, $229 for a full size 5w vehice mounted one, no idea what they are like but appear to be sourced from Motorola (not sure if these are a special batch made for them without certain bits or the full product rebadged... these are the full size din mount which go nicely in your double din stereo space (unlike the smaller cheaper ones which can be a pain to mount)
http://202.45.102.66/page.php?pid=3055