If I were you I would take the whole thing to a blacksmith, if you can find one, and get him to make a new part if the old one is not repairable. I don't think you will be able to obtain spare parts as these Performance brand tools appaer to be regarded as disposable by the importers. I had no success at all obtaining a switch for an angle grinder, which I have since thrown in the skip...........
Mick
March 2008