Sucks to hear this is such a common problem!
I went to u-pull-it yesterday and scored a nice '96 abs d30hp with 140k miles for $70. I'm not certain that it will fix the problem but it's really the only thing i haven't replaced! I'm going to throw some new upper bushings in while i'm at it, and get a Rock Krawler track bar to replace the stock replacement i have in there now. It's a little bit of a shotgun approach, but i'm at the point where i don't care what the problem is...i just want it gone!!!