I've used many A.Z. parts over the years... most were excellent, a few were not. Nobody's perfect.
As for a Condenser(not Compressor) I would compare price, warranty, level of difficulty to replace part and country of manufacture and then make my decision. I would buy a new water pump from them but maybe not a rebuilt. The few problems I've had were usually with reman. stuff such as master cylinders.

P.S. Make sure your water pump leak isn't just loose attachment bolts or such.

__________________
Diesel-guy