A great place for seat supplies
 

Need some hog rings and zig zag springs. Found these folks http://www.atrim.com/

They have excellent prices and speedy shipping.

Sounds like you're rebuilding the springs, correct. I repaired one of mine, ended replacing the bottom spring on the driver's side. It's the side support springs that seem to go. You may want to consider just replacing them if you have a number of broken ones.

If I recall the sides were not the ones busted on ours. There were many of them broken and with a new roll of zig zag springs arriving yesterday, they should be good as new soon.

The flat zig-zags aren't too bad to replace. I had a couple in the back that I replaced, they were a pain because they folded over. Tough to get them bent to the correct shape.

The one bottom I replaced was really busted up so I used pieces of it to fix the others.