Wasn't it a hire car, if you look at the Land Rover based hire cars your logic doesn't stand. The Landy based vehicles up there are on a galvanized Defender or County chassis, TDi engine, SIII doors and windscreen, what looked like a Stage 1 bulkhead and a fibreglass extended roof line.
The backpacker Troopy's are the highline campervan roofed and a standard troopy body and seating, not really Toyota standard.
I helped out one couple engage the CDL on their hire D1, I was surprised to see a D2 gear selector on the Tdi D1 auto, I doubt it would have the electronic ZF and not the mechanical version, the gear selector wouldn't be to hard to bodge onto the D1.
In Rainbow beach there is a wrecker with an old and tired Green and pink Suzi County in the yard, it has a tailgate and a soft wall conversion, and the faded signage of a hire company on the door.
On Fraser island, few cars are stock standard, factory modified maybe? A hire car could be absolutely anything. I wouldn't be suprised to see a Dick Strawbridge creation being driven around there.

