I just got the same machine 2 days ago for FREE! When I went to a local sewing machine place, that repairs old machines I asked the same question. He told me he had a ton of them and threw them out!!!! Can you believe that!!
If you do find a place, let me know as I want them also.
Hope you enjoy your machine as much as I do. I tried the treadle, what a wonderful stitch, but I feel so uncoordinated. I kept on breaking the thread.