My shower faucet handle disconnected from what I believe is part of the thermostatic mixer valve:
I believe that I can simply reconnect the handle when I get a replacement part, but I can't find the part anywhere online. On a tag on the side, it has the following data: R120SSBP TYPE P ASSE 1016 A112.81.1. It is a UFC American Standard part.
Does anyone know where I could get a replacement part for this?