offsets for ZR1 wheels

Lately I've found a lot of ZR1 (the 5 spoke kind) wheels on ebay, but the offset always seems to be wrong. What is the correct offset for the 93 ZR1 and does anyone know of a quality place to get these wheels? I'd prefer polished.
Thanks for the help, guys.

[Jeffvette]

56mm front and 36mm rear. Good luck findign the correct set on ebay. AFS is one of the better quality rims out there. Haven't tried any of the others.

[bans25]

Dennis,

Just a FYI:
If you want correct looking ZR1 wheels you have to buy GM, or older style AFS.

The newer style AFS do not have the deep center lug section.
also the newer AFS has a wide polished lip? not sure why they changed wheel design, but it was for the worse!!