Grammie, you may have to use a generic foot. Just make sure that you get the correct one. It will either be a 'high-shank' or a 'low shank' foot. Try here:
http://www.sew4less.com/contact.php
or here:
http://sewandserge.com/ I have ordered from here and they have unusual thing.
Call or e-mail them and ask questions. They should be able to help.