TR2 seat bottoms from foam?

["Mark Gendron" <mgendron@speakeasy.org>]

What are the odds of creating correct-looking and comfortable TR2 seat
bottoms from foam? Original spring cases are tough to locate (and probably
not in good shape when they _do_ turn up). I understand that the repro
spring cases are considerably stiffer, and some folks have been unhappy with
them.

Thanks
-Mark