You can check here for some info from CraftyBear:
http://www.quiltingboard.com/t-71377-1.htm
You can also use foam core board (it looks like corrugated cardboard, but is white and smoother than cardboard). It can be found at office supply stores, art supply stores, online, etc. Some places may cut it for you, or you can use a box knife to cut it.
I haven't tried any of this yet, LOL! My stash is still pretty messy! :thumbup: :lol: :lol: