Carla - If you want a set of the original homelite's . . . I only live a 100miles (that's california miles . . . so about an hour away) from 4cyclemarine.
http://www.4cyclemarine.com/bearcat.html
The guy who owns the shop is getting old . . . just something to consider . . . if you want to go that route.
Also . . . I'll bet with all the generous folks on the site there may be some interest in a fund raiser to get that boat back in tip top shape. That is if anyone here has some extra boat parts laying around