For something like that you may want to try:
Corvette Shop & Supplies Incorporated
609 N Dale Mabry Hwy
Tampa, FL 33609-1244
(813) 872-6907
A corvette shop is usually good for used parts.
I have gotten a few used parts from this place. Don't call, the lady is part business owner and doesn't know jack! She's an ass. Go to the shop and talk to michael. He's a Corvette owner and mechanic for years and also part owner. He's a good guy and very level headed. If he doesn't have it he can probably point you in the right directionn.

The Munk...