Are these lower control arms? If so I am not sure bushings can be replaced on aluminum arms. If true, not sure you can even replace tie rod ends. It seems as if I have seen generic boot repair kits availble. Other people may know for sure. Good luck.
I question why anyone would sell good m5 lower control arms? They would cost about $200 buck each discounted. of course, you got them cheap. But you do not want to waste your time/money on installtion if they are no good. just my opinion.
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