I have a mechanic who'll do your springs for $100 all the way around. Great guy, he does a lot of work for the SVTOA in Atlanta. He did mine a while back and I can vouge for his work, even corrected the toe alignment when he was done.

I have no personal experience with the springs in question, but when you buy new springs, all you get is new springs, you don't need bolts and washers or anything like that.