Got my pump back from Hart Bros. Core Co. (Oregon) and they did a very nice job. I had previously done the tubes myself (next time let them do it), but they went through the pump and did brgs/seals, put in the Hi-Po impeller, new back cover and gaskets. I asked them not to paint it, so they put on a primer.
I did buy the Hi-Po impeller from them, so that saved at least one direction of postage.
I would recommend them.