If you can get the measurements of the wheel cylinders you may be able to buy wheel cylinder rebuild kits (they contain 2 cups and a spring for each wheel cylinder) the cost of these kits is usually about $5.00 if you can find them. Be sure to verify that the bleeder screws will come out first and once the kits are acquired get a small hone to hone the bore. Wash the inside clean with brake fluid after honing. In most cases the wheel cylinders can be rebuilt still mounted to the backing plate. I suggest a healthy dose of PB Blaster on the bleeder screws long before you attempt to loosen them. You may also be able to find a master cylinder rebuild kit as well.
