Ctod,
Man I hate to hear you're having problems. Listen to these guys, they know their stuff. Obviously I wouldn't want you to take a gun you don't trust but if it was me, I'd try and fix it. You can find parts for them but true, it's not as easy as for the newer models.
Personally, I'd put quite a bit of money into mine before I gave up on it. The thing just flat out shoots!