Seat options for 31 pickup

[Tom Grz]

I’m keeping my eyes open for a set of seat springs for a 31 pickup I’m rebuilding as a driver. If I can’t find a used set of springs, I’ll go the plywood/thick foam route, but I do have a couple questions. Are the bottom seat springs the same for all Model A cars and trucks? Are there any bench seat springs from more modern cars or trucks that are known to fit a 31 pickup? TIA!