When I bought my Bernina 1530, Bernina didn't even make a 1/4" foot. So I ended up buying the 1/4" foot from Lynn Graves (know for the Purple thang). I don't know where I bought the adapter from. I was very fortunate that I won many gift certificates from various Bernina dealerships with my quilts winning in shows so most of my feet I have were paid with the gift certificates.