slicktops are basically the exact same as a regular n/a coupe but with hardtop roof instead of t-tops. Mechanically they are identical.
As for one for sale, good luck. They are really rare.
http://zdriver.com/forums/showthread...&threadid=7899
http://zdriver.com/forums/showthread...&threadid=7880
http://www.twinturbo.net/net/viewmsg...d&msg_id=61455
that's all I found so far, good luck