Been doing a bit of research for an idea I had relating to the use of axis equipment captured in North Africa and the Middle East in South East Asia. One of the ideas was captured STUG IIIs (as well as other vehicles) could have been shipped to Australia for refurbishment and employment in continental defence, freeing up many of the Stuarts, Grants and Lees (the later used only in Australia and mostly for training) for other Allies in theatres where they would actually see combat use.
The various marks of STUG obtained would initially be employed in an adhoc manner to flesh out newly formed armoured units but then as things settled down they would be cycled through base workshops and modified to a close to common standard, including regunning. Thinking 6pdr and 75mm M-1 (or M-2/3) Pack Howitzer, or perhaps a 25pdr. As a war emergency option it is not deployed outside Australia but is retained until replaced in the late 40s, early 50s, by an E10 derived 77mm TD.
Maybe Panzer III tanks could also be supplied and modified with various ways, also being retained into the early 50s.