Last time I did that I gave it to the local mech, he ordered a kit and rebuilt it for me. In this case I could have almost replaced it with a new one off Ebay. Recently while hauled out after the survey and purchase of the PT, I too had a leaker on my 120 and had the yard in Bellingham replace it with new. Later of course I found an old one and a new one on the boat. And a new fresh water pump to boot. But that's OK, still have spares aboard. Back when 'Doc Freemans' was still in business, they would do that stuff but they are long gone now. I left Seattle in '89 and I don't know who does what anymore. No help here either I guess.