You should not have a problem finding a dozen people who will make a mold for you. Normally you just send them the design of what you want, and they will make it for you. I like the RCBS adustable mold, I cast a 525 grain bullet out of mine, and I shoot it without any lube. You can adjust it to make a lighter or a heavier bullet.

Have you slugged your barrel yet? What is the groove, and lands diameter? If you want to truly go custom, that will be the first thing a mold maker will ask you.

I am a member of the Cast Bullet Association. Go to the CBA forum, or go to the CastBoolit forum. There are alot of people there who will overwhelm you with their knowledge. There are alot of great links there. Tom.