They are available. There is a generator shop in Johnson City, TX that puts them in my generators. I'm not sure where he gets them, but any generator shop can get them if they want to. Used springs aren't worth putting in. They are not only old, but usually rusty and been subjected to heat. Have you checked your comuntator? If it is out of round, it will make the brushes bounce. A generator shop can turn them on a lathe.