For some reason, my recently-manufactured Uberti '66 came with the older-style lever that has the replaceable cam lobe. That was a welcome discovery, but after looking at how it was made, it struck me that it would be a pretty simple feat for a man to reproduce using only some files and a drill press to drill the hole for the locating pin (probably just a hand drill if one is really steady). I made a wedge once from a piece of an old file that I annealed, filed to shape, and rehardened &tempered. Now THAT was a PITA, but a cam lobe would be so much simpler, I think.