I just bought a used 2002 525iT wagon. The xenon headlight assembly is broke, in that the parts inside the plastic housing slop around freely - bulbs are OK. So I obviously need a replacement and have been searching everywhere. I see a ton of halogen lights that look exactly the as my xenon unit - except for the transformer. The question is whether or not I can use a halogen unit and mount the xenon hardware as a direct replacement.