Raw seawater pump corroded

Have to fix the boat as well before the summer starts. The raw seawater pump had a strange sound to it last summer. Took it home today, opened it, and found two bearings totally corroded. The pump housing is made of brass, while the shaft and roller bearings are made of steel. It has been running for 30 something years, and the brass looks as good as new after a slight polish. The shaft is SS and also looks almost new, but the bearings are gone. There is also some gasket things on the shaft that are worn, and probably the main reason for the corrosion.

New pump is ordered.