if your after something around the 3ft mark plenty to choose from, mertens, mangrove,spencers,sandies
HOWEVER another couple are the black-footed rock monitor (glebopalma), kimberley rock monitor (glauteri),emerald monitor (prasinus), and if you find any of these for sale please PM, cheaper the better.lol
dont know if your in NSW or not but all of these except the sandie are class 2