Any one know where I might find big blocks of styrofoam I can use to shape pices for custom side skirts and door pannels? Id liek to work with pices 2' 1/2" X 2' 1/2"x 2' 1/2" or bigger. like I said I need big pices, and they need to be able to be sandable without tearing. If no one knows where to get them then info on what type of sandable perticularly dense foam I should look for.