Just type in a search on the internet for upholstery seat springs. You can say upholstery coil springs. You can say zig zag springs. And you will get a million hits from a zillion different people and companies that sell coil springs identical to the ones in your truck in every size and configuration
1950 Chevrolet 3100 (Ol' Roy)
1939 Packard Standard Eight Coupe (The Phantom) | 1956 Cadillac Coupe de Ville (The Bismarck) | 1964 Ford Galaxie 500 coupe |1966 Ford Mustang (Little Red) | 1969 Pontiac GTO (The Dishpit) I 1979 Ford F-100 | 1976 Ford F-150 (Big Red) | 1995 Ford F-150 (Newt)
| 
