I don't know how they get away with putting out sub-par stuff. Will probably need to dig a unit out of the boneyard and like you say rebuid it.
You can send your pump to Terrill Machine Shop to get it rebuilt. Datona Parts may be able to rebuild it also. Terrill Machine did one for me a few years ago.
Thanks Dave and David, I am know hoping to find two pumps. Send one out to be rebuilt and try my hand at rebuilding one. always good to have a "working" spare.