rackdoctor.net has a pretty good reputation for quality rebuilt racks. I feel like I have seen a DIY on replacing the seals but it was not on this site. Perhaps it was on bimmerforums. Swapping steering racks is really easy.
__________________ ~Dave~
98 328ti Morea Grun slicktop 11 128i space gray slicktop 13 JGC WK2 Deep Cherry