minicell foam

Does anyone know where I can get minicell foam in 4" thickness?  I purchased a 4" x 2' x 1' block of this a few years ago and it worked great for carving a backrest. It gives you more thickness for a curved back shape than the 3" material does. 

Try here http://www.usafoam.com/closedcellfoam/minicel.html

KK

That works.  Thanks