Corvette Rubber Company are based in Cadillac, Michigan.
They say:
Corvette Rubber is the premier manufacturer of rubber parts for your corvette. We manufacture top quality rubber seals, weatherstrip, hoses, pedals, pads, shift boots, body mounts, and other parts for your vintage and modern corvettes (1953-1996).
Corvette Rubber Company
10640 W. Cadillac Rd.
Cadillac, MI 49601
Phone: 231-779-2888