I think you're right there, Geoff. Your link to the model images show a lot more detail than some of the real photos online. A few give-aways seem to be the radiator, tailplane, exhaust manifold & the rounded gunners station. Also the metal tubular framework above the pilot, supporting the wing. A German plane, it's definately not in Australia then. Looking at this image, http://imxcited.com/images_the_hun/photo_rumpler_civ.jpg I can see why the fabric is missing; someone has souivenered the Maltese Crosses from both sides. Looking at it closer, perhaps the photo of the burnt out German plane is a Rumpler as well. The exhaust manifold seems to be a clue.
Cheers, Willie.