From the Townsville refueller's wife - in the shower this morning, the preferred model is the new 'NGTD' model.
That's the New Gen Turbo Diesel made by Toiyota, its a 'Special' 8 Litre Diesel built especially for the 'Wet' in the NT.
350 HP and around 10.3 L / 100 nm so they say.....
Solar panels on the wings optional extra, for 'extra boost to the magnetos'. Made to shape of course.
Spare parts are said to be available from 'Micks Toiyota Auto Parts', Bagot Rd., much cheaper than from the 'usual' FAA / CAA / CASA approved outlets.