I don't own a Featherweight but I do own her big sister therefore not sure how accurate what I am about to say is. If they both use the same bobbins then you can find them at your local Joann's, also you can find a lot of items to get her running really well online. I think the website is sewing parts online (?) If not the right site surely someone will tell you the correct name. She will be a beauty when you get her all cleaned up.