AGU, AUM, AUQ, BAM, AMK, APY, AYP, the blocks (and crankshafts too I think) are pretty much all the same. The pistons/conrods/compression ratios vary between these listed engine codes though, so retain your AGU conrods/pistons if they aren't damaged.
Avoid using the longitudinally mounted 1.8t block though, found in the likes of Audi A4/A6, VW Passat.
Out of interest, where is the crack on your block? What caused it? Pics?