My front seat has been spitting out pieces of springs at me randomly over the past few years, Well it decided to spit a few out all at once and the extra saggy seat that resulted was kind of disturbing.
I made a trip to a nearby junkyard to look for a replacement seat and was really disappointed by what was left in the yard. Every seat he had was absolutely ruined by exposure to weather. They've got 2-3 dozen squares/burbs/blazers but not much of anything useable. There was one '87 burb that must have just got there because it isn't picked clean yet. Has complete drivetrain SM465/208 with hydro bell and pedals!
I pulled my seat just see what if anything could be done to fix my existing one and was pleased to find my seat is actually a thick foam piece over a raft of thin wires with a series of extension coil springs holding it up. There are 14 springs, my seat had 6 intact

The local hardware store had a really close match to replace them with.
What was less awesome than the broken springs was the broken seat frame, and cracked nearly in half drivers side adjuster rail. No wonder the seat was sagging.
I was able to weld in a section of 1" angle to fix the seat frame and welded the crack in the adjuster rail and plug welded on a piece of 1/4" steel to reinforce it, hopefully it holds up. I threw on a new blanket seat cover too. No more saggy ass!
You can see the new angle iron on the right hand side of the picture, new springs on the left.
Adjuster Rail repair.
New Cover.
