Looking for "Case Inserts"

I do projects with cedar strips (like a built a cedar strip canoe last year).

I'd like to build a cue case, but need the insert (foam material with holes) to build the case around.

Does anyone know where I can get an insert for a 2 x 4 oval case ???

You can post here, or e-mail me at: WTJordan@aol.com

Thanks in advance.