Told you :D

Cast them!

well... one idea you could try is to just mill down the flat faces and then break out a good, old fashioned file, would be a lot of work, but unless you've got a really fancy mill it's pretty much the only thing you can do other than casting, which honestly, if your that handy, the equipment to do casting is only a couple hundred bucks... if you want aluminum you can make or buy an original out of acrylic and then make your negative out of good clay, melt the acrylic out, and replace it with aluminum... you gotta break the molds, but it'll come out perfect with the least amount of effort

on another note, I still have no idea how to use auto desk, even after 1 year of being told how to.