Can't believe you can't find one. I've got an NOS one, but you ain't getting it. That's for me. LOL
Worse comes to worse, you can MAKE one. Or get one made. Take a piece of round stock, cut a flat spot in it, then mill an indention in the flat spot for the bolt to ride in, then drill and tap a hole for an 8mm stud or something you can loctite in place, then use a nut/washer to hold it to the bracket.
Just thinking out loud. If you decide to make one, we can probably get you dimensions...
Worse comes to worse, you can MAKE one. Or get one made. Take a piece of round stock, cut a flat spot in it, then mill an indention in the flat spot for the bolt to ride in, then drill and tap a hole for an 8mm stud or something you can loctite in place, then use a nut/washer to hold it to the bracket.
Just thinking out loud. If you decide to make one, we can probably get you dimensions...