So I spoke to a company called DuraBrake and they can make custom/made to order brake drums. Minimum order qty is 12 and the person on the phone rough quoted about $450 a piece....I am curious if any one of the parts companies (LMC, Chevys of the 40's, etc) would be interested in going into a larger lot size to reduce cost, or if we had enough interest here for them. But for $450 a piece its same or cheaper to swap the entire rear axle at that point....