I wanted a mold for deer antlers, so I bought a set I liked on eBay and am going to have a rubber mold made from them. If ever I need anything a little wierd like that, I look on eBay. If I were braver I'd try making a mold from them myself using one of the many kits available from places like Dick Blick, but I just assume let someone who knows what they're doing do it for me! Campbell Plaster and Iron in Rutland, VT makes my molds for me. I did make a positive cast from the antlers so I would have something to play with as I work on my deer mask.