keep looking. there's plenty of rust free candidates out there, but most are still going to need rubber replaced among other things. and be careful. i saw a '68 hartop on ebay that said rust free, and it didnt have the cutouts for the arrowhead on the quarterpanel correct for '68. and it looked like it had camaro side markers.
that all origional vert might really be worth $20k, but i'd be scared to drive an all origional. i'd rather have something i can do what i want to, and drive whenever i want.