MX Tech has the SKF seals here:
http://mx-tech.com/kit43w/
Do I HAVE to replace the fork bushings, or should I inspect them for wear and only replace if they are worn?
I am not sure of the total hours on the bike, but I have put 46 hours on it since I rebuild the engine (when I got the bike). I would guess the bike has at least 150 hours total, I have no idea if the forks were ever serviced by the previous owners.