Check out some of the vendors right here on the C.A.C.C. We have several members here that are also Vendors for various parts.
may I suggest you start with ssvet http://ssautovett.tripod.com/ssautosport
This guy knows his parts, and he even knows vette parts too.
Also check the list on the left side of the C.A.C.C. HOME PAGE, Lots of resources there.
Hope this helps.