You can figure out what kind of shank your machine has with this info:
http://www.anniescatalog.com/pages/which_foot.html
Once you know what kind of shank it is, you can purchase generic feet with that type of shank to fit your machine. Generics are not always as good as feet made especially for your machine, though, so you may want to check with the dealer to see if there are feet made especially for your machine. As others have mentioned, you want a walking foot and/or a darning foot for quilting.