The Australian War Memorial is digitizing and placing on-line the Army vehicle registers.
The entire AIF series, and the first few AMF series are available to view or download at:
https://www.awm.gov.au/collection/AWM126/
Thus far, the AMF registers include many motorcycles, Cars, early CMP purchases, MH artillery tractors, Wiles steam kitchens and much more.
No jeeps or jeep trailers as yet - they came later.
The rest of the registers will be progressively uploaded as digitization is completed.
Happy hunting!
Mike