I own an D15A3, which migh be in need of a new crankshaft. I was wondering which crank would fit into A3 as we don't have much D**A* engines lying around here in Estonia. Although there's some of D**B*-s on the market.
I would find out the main journal and rod journal sizes and see if they match up.
if they do, you would have to find out if the rear main seal fits, and if the oil pump would fit.
as it is very doubtful, it may be easier to source another motor. perhaps in a crashed vehicle with the correct engine is the best option. at least you would have feedback on whether it was running okay or not.