This is the classic Pontiac wheel, Horn button and pieces are available from the big US Pontiac Suppliers.
$75 + shipping
Ray White, Toronto ON
1973 LeMans 454 "Astro-Jet"
Built March 9, 1973 - Oshawa ON
1993 Corvette Convertible LT 1
Built January 10, 1993 - Bowling Green Kentucky