When I removed the back rests from the frame and popped all the staples, the longest part of the job, the "foam" had become dust! Looked very much like the foam used in the tunnel. Today I picked up some fibre foam which is meant for outdoor use do to its anti-mildew qualities, cut it to fit and stapled the seats back up....Incredibly easy and cheap! Cost me $16 (50% off) for the foam. The rest I had on hand already.
Before...saggy dust!


I had to cut a bit extra for the end...




After...stuffed full!
