Where can I get flexible foam sheets?

I was looking at the WIP pictures of Wolfgang's Mordheim table:

http://gidian-gelaende.de/Material_HP/Wolfgang/WIPmortheim/album/index.html

In the pictures it seems he uses wood for the structure, then uses thin layers of foam on the outside for details. Can somebody tell me where I could find that kind of foam? Preferably online, but if it might be found at a hardware or arts and craft store that would be good too.

The white stuff is Depron. I think it they also use a stuff called Selitron(sp)

Blue foam, pink foam etc.. All these are insulation type foams. I am not sure where you live, but for people that live in warmer climates like me ..California the stuff is impossible to find.

RCfoam.com sells Depron sheets. I have tried other foams - Pink / Blue but this white Depron stuff is awesome!

http://rcfoam.com/cart.php?target=category&category_id=60

HornedRat,

that shop also offers Cellfoam 88 and Gediplac. Have you tried any of them?

I am compiling a list of this info, because it comes up over and over again and I am currently making my own experiences with these materials (Depron, Selitron).