First off, I'm not talking about replacing the rear plastic housing and rubber impeller. Those kits are all over the place and I've already done that. What I'm asking about is the actual front part with the shaft, pulley and bearings. The front seal behind the pulley had gone bad and I didn't notice, and over time enough moisture made its way into the bearing, eventually causing it to fail. I know I can get the entire unit to replace it, but after pulling off the pulley I see a snap ring holding the bearing in, and it doesn't seem like it would be too bad to disassemble it and replace the bearings and such. Do they sell these parts or am I stuck paying $300 for a new one? I've already bought a new one so the boat could go back into the water, but I would like to rebuild the old one so I can have a spare.