rolled turf, rubber car floor mats work good to.
I have some 95 X2 styrofoam on ebay for sale. You can have it for 10 bucks shipped. it costs 35 from Ron Ayers plus shipping.
Just go to Matts and get some of his scrap foam. Mine just lays on a piece of thin rubber and straps down.Is the styrofoam in the shape of a mount or what? I'm confused.