My 1984 GL Wagon needs work, can you help?

I just bought a 4-Door 1984 GL Wagon with 164,xxx thousand miles. it runs and drives well, save for the lack of rear differential mount bushings making a racket in the rear end, the engine surging because the distributor is very sloppy, and the oil dripping from the power steering pump. The power steering pump seems to be leaking between it and the reservoir, so I believe I should be able to take it apart and re-seal it, correct? The distributor just needs to be replaced. The bushings I cannot locate for the life of me so I am looking for suggestions on where to get them or if I should make them. The owner I bought it from had just replaced the shocks and struts all the way around, the starter, got new tires, new seats, rebuilt the tranny, and replaced all seals and gaskets for the engine. This is the first Subaru I've owned, and auto parts stores don't seem to have the parts I need to replace, so where do you guys suggest I look? And what else, if anything, should I look into on this car that could be a problem in the future?

Thanks for any feedback.