I recently saw a show, I think it was a DIY show, where the home builder was doing their own spray in two part foam insulation. It said they rented the equipment from a builder supply store and bought the liquids. I am looking to do this, as I feel I can get a more accurate application as there are specific areas I want to deal with. I called Lowes and HD and neither have it. Is this not a common DIY? Where can I get the equipment?