I bought a '71 CB500 last winter and have been restoring/custom rebuilding the bike. I got the carbs w/the bike but they weren't installed, I took them apart to start the rebuild and it looks like someone else had the same idea but didn't know what they were doing. There are a few striped screws and bolts and they striped the throttle valve/needle jet plate screws and tried to dill them out but they destroyed the throttle valve. Can I purchase new or aftermarket (103 2.5 slides) anywhere?