[Grumpy old man]

I have springs and new spring clips for installing also you can add these reinforcement panels to add support , the side springs can be replicated using regular z springs when bent correctly


https://www.albrightssupply.com/Zig-...4-p/sp2024.htm

https://www.albrightssupply.com/Flex...8-p/flex18.htm

the flexolator panel you would need 60" to go across the seat bottom ,You attach them on top of the seat springs use burlap between the stock springs and flexolator then seat padding