yes, quite a few bits exist out there, was talking to the fellow who traded me the bits and we discussed how Triumph was not willing to put out lots of various models, they just picked something and stuck with it, but BSA had a million different styles all tailored to the public desires, and so it becomes ever so much harder to keep track of all the differences and such, even with the Bacon books!
so it's pretty hard to see what I was getting at in the picture I provided, so I broke it down and annotated for clarity.
A is tapered as standard for the top yoke.
B is relatively parallel, but roughly lathed
C is slightly raised larger in diameter and parallel for the bottom yoke
D is the second taper, again roughly lathed down to the smaller slider section E, which is parallel for the rest of the run. the lowest looking ring in E is just where the bottom bush was attached.
I only see the four holes around the very bottom of the legs, but there could be one I missed if it is plugged up, but I wire wheeled them clean to see what I really have and didn't notice one.
those ones you have pictured look very nice, all hard chromed and all.