39 Grilles are available through most of the major parts people like Jim Carter, etc. I've seen quite a few on Ebay lately. I think the plain steel one is priced around $250.00 and the chromed ones for about twice that?
The difference between the original and the repros is that the repros don't have the crank hole near the bottom. Really more of an aesthetic issue. I've been told to only crank start these if you like broken arms.