I have a 28 AA truck with dual rear wheels. Budd wheels with a special adapter that was likely era aftermarket. Pretty sure no dual wire wheels from the factory.
Same here, I've never seen wire spoke wheels on an AA. I have seen them on regular model A pickups. The Budd wheels on the AA are very heavy duty, probably because of the weight of a heavy payload, overloading, etc.
I stand corrected, Keith is right. I checked my resources and 28-29 did have wire wheels available, but I'm not sure if they were offset like a dual would be. Both the 131.5 and the 157 wheel base came in either a single rear wheel or a dual as an option.