Buck--I should have had your dad to my zillz desert seat.  It might be done by now.  I found a local guy to do the zilla seat cover and I also have a sweet yamaha vmax with a corbin custom seat i neet heavily modified in the fiberglas pan and back strap.  I did great word but man he is slow. he has had it a month and not touched if but he did finish the vmax seat.