Roger, I have a very reliable Brake caliper rebuilder here in Detroit. They do a lot of work for local motorsports guys and shops, and are especially handy for calipers no longer in production. Haven't had them do the ATE UFO calipers yet, but they've done a number if G60, V8 rear, Porsche Big Reds and Porsche Boxter calipers for me. Ingo Rautenberg