foam filter materials

[fishyfriendcanada]

Hey folks!!!! I live in the lethbridge Alta.area and I am looking for large sheets of "open celled" foam, to make a bunch of corner filters for my 2-33gal.fw 2-10gal.fw and 4-5gal.fw.The foam should be aprox.8"thick and at least 4'square .Does anyone know of a supplier who would carry? ,in this area? I have checked with every one I can think of, from fabric stores to furnace suppliers .