Seat foam?

4spdragtop said
I have a similar "issue", covers are great, but the burlap appears to be crumbling, and/or non existent, which now puts springs right against the foam and its disintegrating also.
I will at least need burlap and possible foam.

Mine weren't that bad Steve. Likely a lot less use.

I used 3 or 4 layers of new burlap when reassembled but didn't replace the foam. They still came out OK for me .......

I like that "thin layer" idea TF.