it's won't be too hard to find the parts, doing the work correctly wil probably be the hardest part. If you get a Bentley Manual, and you can use your hands pretty well, you can do this job.
'86 325es (TURTL3): PJ peetsa hawler
'87 535is (BADWATER): almost done... really.
'86 325e (GRN HLL): DD/show/rocket
'04 x3 3.0i: Wife's Bimmer (manual, woot!) My BMW Blog