I bought my walking foot from the ad below:
"Ordering infor for walking foot for Singer slant machine by QuiltBug.
This is a copy of the ad on the internet:
Click here to order the Even Feed Singer Slant Walking Foot for $12.50 (For Singer Slant machines only)
We do not accept returns on sewing machine feet""
I have a wonderful old Singer 201A slat machine - guess what - the foot doesn't work and true to their ads, they do not refund on purchases of "feet" even it their ad seems to be erroneous.