You can order the epoxy on line at any of the taxidermy suppliers or your local taxidermist may spot you some.There may be something similar at the hardware store but often the quantities are small and in the long run,it is more expensive.A lot of it is bone colored but a few brands come in black,brown and other colors.Some brands are:Sculp Epox,Magic Sculp,All Game etc.Once you get some,you will find a lot of other uses for it.It can be sculpted,molded,sanded,ground etc..You can even make silicone texture molds and press these into the epoxy after it firms up a little.this way you can make a leather texture,antler or whatever.Taxidermist use it for a thousand things.Rebuilding antlers is just one.