While it would be inaccurate to say they come up for sale all the time, you might have better chances finding one closer to home. Of course you really can't call SEQ "close' to home, but the
Military Jeep Club of Queensland and the
Queensland Military Vehicle Group are your State clubs where you might find something, although predominately operating in the Gold Coast-Brisbane-Sunshine Coast area. You could also contact the Yahoo Group of the
Tablelands Military Group.
Another option is to contactact Ross Prince at Hervey Bay, who has fairly well developed MV contacts of vehicle owners throughout Queensland (He will be a good cantact to keep as he sells a wide range of spares for most MVs). He can be contacted on this forum by sending him a PM to Lendlease.