Denny, if you've got access to a Bridgeport or a lathe with a 4-jaw chuck, there's no reason you couldn't bore the cylinder a little oversize, press in a stainless steel sleeve, and bore/hone back to original size. The cylinder will be better than new, and it will never rust-pit again. Of course, the brake line and bleeder holes will have to be redrilled, but that shouldn't be a problem. Use a Sunnen connecting rod hone for final bore sizing and finishing. I suppose you could also build up worn wheel cylinder pistons with hard chrome, and centerless-grind them back to original clearance. You'll have $200.00 worth of labor time in a $30.00 part, but if you don't count your labor, have at it. Dorman products used to supply our bulk wheel cylinder cups back in the 50's and 60's, but I believe that company has been bought out by another outfit some time ago. Try Hemming's Motor News for new-old-stock brake parts ads. Somebody's probably got some stashed away and they'd love to get rid of them.
Jerry
