Well, it turns out that I don't need this information anymore. If anyone does know the answer, maybe someone would appreciate it in the future.
Many moons ago, I took apart a printer. It was probably a dot matrix printer. It probably was before I even bought my Porsche. For reasons unknown, I saved a pair of bushings from that printer. Those were almost perfect for this application.
I'm still pondering the odds of how this happened. Quite a bush fix, if I dare.