I avoid the machine dealers when I need my parts, like screws, and go to a commercial sewing machine repair place. So far I have had better luck there, and cheaper, too than at the dealers who sell my machine. I even buy my needles there, by the 100, because I got a fantastic deal. Sometimes auto repair shops might have screws or o rings if that is what you need. For this I have found small town places much better than in the big city.