should you not be happy with that. I do have some, but seldom ever go to eugene, I have found that many other brands ( whites, 15 clones kenmores dress markers so on ) of machines the hand wheel adapter is the same, some use a set screw.
also in cottage grove is a shop that only deals with vintage machines, The guy has alot of parted out machines his prices are very good. It's well worth the drive down there if just to shoot the BS with him. He has a singer 7 on disply. can't remember the name, I can look that up, he's on river road right next to the golf course parking lot..