I thought I read somewhere that a person can buy rubber to make his own bumpers. Does anyone know of such a compound and where I can get some? I need to custom make a part for a customer, not for his cue, but for his sail board. I figured I could make a mold out of Delrin and cast the new part. Any ideas? The piece is about 6" long and 1/2" in diameter, used to hold the sail upright but flexible enough to bend when he falls over. There are no replacement parts available and the board is useless without it. I can provide pics, if needed.