I'm having trouble locating parts to replace/upgrade my extractor. Given that my rifle is about two months old and already has extractor failure, I'm not excited about replacing the parts with OEM, since they seem to be of lackluster design/quality. Is there a better extractor out there? Where can I find the 0.140 detent ball that everyone seems to recommend over the OEM 0.125 ball? Any tips would be appreciated, especially if I can find a way to have parts in hand by Friday.