I just looked up bobbin cases on ebay last night. You can find one for $35 and up. I would definitely buy one of the original SIMANCO ones though and not a modern replacement for them. I've found the featherweights to be sensitive to reproductions. Mine do much better with the original bobbins, attachments etc. You might also Google Featherweight service and find someone who has an original bobbin case they can sell to you. My white FW will not even sew unless the bobbins are the antique ones. She tangles up every time!