Obviously this is not the real one, but this isn't bad looking and is a good price. 99% of people wouldn't know or care that it's not original. If you were going to use it for the valet key, I'd think it would work fine:
http://shop.corvettecentral.com/Corv...-p8767410.html
Kind of funny they even make it. Not only does the ZR1 not have a valet key, it doesn't even have an ignition key. You don't need a keychain at all, let alone a two-piece one.