A small update for 2018
Following the Zimmerman 150.3477.20 trail you find these new options that are more afforable
130i/ 325xi/ 330i part for 328ix and 135i
324x22
MEYLE 315 523 0020/PD Dimpled/Slotted
TEXTAR 92231203 Dimpled/Slotted
ZIMMERMANN 150.3477.52 Dimpled/Slotted
FEBI BILSTEIN 43800
PAGID 55312
from:
https://iparts.ee/parts/info/meyle/3155230020PD
Also for the F10 528i 535i idea a new Part with Aluminum hat
DURA-GO BR900984
CENTRIC 12134131 C-TEK ( maybe)