Eddy, I made my seats like Dale (Schu) described in General Discussion “Seat Fix” posted March 17 2011.
I used more webbing than Dale, 5 across and 3 fore to aft. Foam used was 3″ thick “Luxury Foam” topped with 2″ “Memory Foam”. Descriptions of the foam can be found at http://www.foamforyou.com/Foam_Specs.htm
For the seat back I used 3″ thick HD23 foam covered by 1″ thick Loose Dacron. I found all the materials at a local foam store.
I’ve driven over 500 miles so far and couldn’t be happier with the seat comfort. Thanks to Dale, no “dead butt syndrome” (DBS).