I am new here, but I love old machines. I picked up a 503A in the Goodwill store today, for $20 it is in a small cabinet. It has the Zig Zag cam in it, it had no booklet or anything else. Where can I buy the zig zag faceplate. It sews so good, has beautiful stitch, all she needed was a little oil. I love to read about everyone's finds. That is the first thing I look for in the thrift stores.