NOS for $60 isn't a bad price.
http://www.kijiji.ca/v-other-auto-parts-and-accessories/city-of-toronto/nos-black-deluxe-gm-seat-belt-for-chevelle-cutlass-skylark/1229567365?enableSearchNavigationFlag=true
If a fella was restoring say 1973 LeMans and the original owner failed to order colour keyed belts that would be just the ticket. Do I know anybody like that?
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