Yeah, those pesky little things which are always missing....
I have one of the four I need. Over the weekend I reached out to some contacts in the antique motorcycle world about the possibility of having some made, using mine as the model.
Those guys in the antique motorcycle world can make ANYTHING and I've already found one guy who told me he can do it.
Joe said that the nuts had a small plastic piece inside to allow for intonation without removal of the nut. He's going to try and get me photos.
Don't know how many I need to make as a minimum but there's already enough interest for a few dozen.
I'll let everyone know how this goes.