I need a spring too. I just bought set of seat adjusters off eBay and they came with one spring. It measures 12 3/4" long. I've seen a few venders selling 1955-1980 Chevy truck bench seat return springs. The ads say they are 12" long. They might work. I can't find any venders that show 1948-1954 seat return springs for sale. I guess I'll take my one original spring to the hardware store and see if I can find a close match.