What kind of clamp does it have? I doubt if there is a walking foot available for the back clamp like the early 66s were, but the later ones were side clamp and some back clamps have been converted to side clamp. A generic short shank walking foot may fit a side clamp. My 1918 has a back clamp, but I don't use a walking foot to quilt so it doesn't matter if I can't have one.