You could always do this:
http://www.onlycubcadets.net/forum/s...ad.php?t=36031
As far as your original question..... no, you won't be able to have a cast or an aluminum one made. The cost to have the die made for a one time casting would be horrific. Good luck finding someone willing to buy 100 of them to keep cost down, plus.... paying for it up front. Having a someone do an injection mold, or even a specialty fiberglass shop (someone on here does that) make one would be your best, least expensive venture.