I looked into doing this but I don't think I went through with it. From memory, the bushing sleeves are thin so you really need the proper tooling for the job. If your bolts are in good shape (including the eccentric portion) you could probably get away with cleaning them up and using some anti-seize on them but new bolts would probably be better. I think some people were cutting the old bushings out so you can get away with less tooling.

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1988 325is (purchased new) sold
2004 X5 3.0 2005 X3 2.5
2008 X5 3.0 (new to me)