Styrofoam Shock

Been busy with company and trying to get some "honey-do's" caught up this past week so I can start some serious prop building. Yesterday I bought some 2" styrofoam and pink foam board from The Home Depot and I have to say the regular price of 2" has gone way up within just a few cents of the pink foam board which was already ridiculously high. Effect of gas prices? I have to find a new source! Except for a lack of storage I could have gotten free styrofoam last year from a fellow haunter's friend that is in the roofing business. He even had the 4" stuff! Feel kind of stupid now that I didn't get at least a couple sheets... live and learn I guess.