I am curious where everyone buys the pink & blue styrofoam. I live in Southern California (Santa Clarita to be exact) and I can only find the large sheets of white foam insulation at Lowe's & Home depot. I bought another kind. It was yellow in color. I thought it was similar to the pink and blue I always see everyone use. I cannot get the paper or whatever it is off the outside . I am thinking the kind I see may not be available in CA for whatever reason.