Need supplier contact infor for structural foam

[Smiley]

I am building an A Hemp hydro and need a source and contact info for structural foam. I need two pieces 1 x 18 x 36 inches and 3.4 x 18 x 20 and a couple more pieces of 1 x 8 x 20 inches for the chines. five pound density is preferred. Can anyone help me with this or similar?
Bob Smiley

[SeaBat]

Bob,
I purchased mine from Wicks Aircraft Supply. I bought Last-A- Foam.
Bill Thomas