Take it to another front end shop. They apparently do not know what they are doing if they cannot tell you which component has the problem.. it could be a worn or bent suspension component.
e34 front suspension has only adjustable toe-in, not camber and caster. If they are off, parts will needed to be replaced.
Thanks,
1995 525i Auto, M50TU 2.5L, EAT chip, 1/95 build, USA, 205/65/15 tires, ASC+T, HID, lumbar, EC Mirror, BMW Alpine 5 radio with BMW-Pioneer CD Changer, abt 236k miles, Oxford Green/Parchment