Doing a pump assembly rebuild is super easy. NAPA has the kits. The can is really thin, cheap metal. I’d say your best bet is finding a good junkyard unit and rebuilding. I did mine. Same thing. Some dunderhead pried up on the underside to tighten a belt. Fortunately you can’t see the dent from topside.

Be prepared for the paint on a rebuilt can to be sprayed on bare metal and nasty cheap.