I make all my own molds. I make them out of auto and marine resin. Some guys are making them out of 100% silicone because it's very cheap. Go to http://www.tacklemaking.com/forums/ and do a search for mold, mold making, and "exciting new mold material" The last one is all the info on how to make a mold from silicone. You can also make them out of paster of paris and Durhams water putty.