Sarg I've found a place that can make just about anything with EDM equipment. I know of one guy that gave them a set of aluminum rings and $100 later he had them made in tool grade steel. If I can find a set to borrow they will put them in a computer somehow and then can crank them out. A rough guesstimate without seeing them was $350 for rings and bases. They said that was most likely a little high.