The handle on what might be called a diverter valve cracked off (see attached photo) and I've been using a wrench in the meantime. I'd like to replace just the plastic valve and cap which it appears I can just unscrew and replace but I can't seem to find the correct terminology or part to just buy this piece. Anyone have an idea of what term to search under or if there is a good pool supply resource to buy this piece? I am trying to avoid replacing with a different kind which would require cutting and replacing PVC. Any help is appreciated.

Thank you! Andy

Thank you! Andy