Can Seat Foam Be "Fabricated"?

Hot wire (12v transformer and some high temp wire) or this handy tool will cut through foam rubber like a soldering iron through a candle the trick is to find the right density. The butt bun should be very firm or a thin low density pad over the supporting bun.
https://www.amazon.com/Knife-Cutter-Styrofoam-Engraving-Calcor/dp/B078P81GGD/?tag=fabo03-20