I don't think anyone is selling a rep dial for PAM112 right now. Even the PAM112, or PAM176 itself has not been produced for several years, so I would not count on buying a new one anywhere.
As for gen dials, everything has been the same for many years now: there is no specific scheme of work, and gen details are becoming less and less common, i.e., something may appear on different forums and platforms a couple of times a year, but what will it be, when, and who will sell, can never be foreseen. Just randomly find a gen part, buy it, and think about what it is and what to do with it next.
So, a targeted search for a specific dial can take a completely arbitrary amount of time and effort. Nevertheless, good luck to you!