I decided to strip and refirb my callipers when they began sticking i also bought some decent pads discs and fluid for an overhall. On getting the pistons out they are badly corroded and not in the best of shape with slight pitting. I have no intention of upgrading to the brembos at this moment in time. Just wondering if anyone had any old rear callipers or pistons laying about or if there was a place that sold a new piston as i have had no luck finding one the mearsurements are aprox 43mm x 45mm. Any help would be greatly appreciated. Could i still use the pistons i have or would there be any risks in this?