RAAF WW2 vehicle markings

[cliff]

I have got a CMP derrick truck model to finish and would like to do the markings as an RAAF truck similar to the AWM photo below (neg # OG0626) which has the caption..... "KIRIWINA, TROBRIAND ISLANDS, PAPUA. 1944-01-31. INSIDE THE HANGAR OF NO. 12 REPAIR AND SALVAGE UNIT RAAF, BEHIND THE BATTLE LINE, WHERE A SPITFIRE AIRCRAFT OF NO. 79 SQUADRON RAAF IS BEING REPAIRED. "

Can anyone tell me what markings would have been put on the truck including location and colors?

Here is a picture of the model so far. This has been base painted in Australian Post 1942 Service Green but still needs detailing.