This is the seat now:


I need to learn more about seat foam, type, density, where to buy, etc. Also about spray adhesives.
I just bought a pneumatic staple gun, since I know from past experience that my old hand Arrow T50 doesn't work well on seat pans. I also bought 5/16" stainless steel staples.
Can anyone point me towards some resources for educating myself about foam and seat-work?
Thank you.