I recommend buying a completed Aluminum mold. If you have something unique and want to make a few just for yourself, as others have said you can make a plaster mold, but they kinda suck.. You can have made a vulcanized rubber mold, and you could get as many as 100 pours out of that. You can buy the rubber and make your own mold but there is a guy out there that made me a very nice mold out of this for a VERY VERY reasonable price and I have used it for years. Further the rubber he uses is different than you can find online. I found an ad for his services in a fishing magazine and I wrote him. I don't have the contact anymore.
Blank AL molds require someone that can machine it properly, I would not try this myself unless you have done it before. (its a one shot deal)
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