At StickBow.com, or TradGang.com, you can raise knappers by posting this question. There are several who will knapp you broadheads once they know about what weight you want to wind up with. If you contact, through a google search, the Michigan Traditional Bowhunters, and ask on their forum about Norm Blaker, probably one of the best in the buisness, someone will know how to contact him as well.
Best of luck, Arch