@ bmwak : many thanks for the information. I thought that these are called control arm bushes (I thought that tension strut is the control arm) I didn't know that they are called brake reaction bushes.
I will try to find their new p/n then or maybe buying from powerflex could also solve the issue
thanks again
PS: there are two part numbers in the pic...maybe the 2nd is the old one that stopped?
edit:
just checked at american site bmwfans.info and it appears that the the 1st p/n appeared in realoem as hydrobearing started production when 2nd p/n discontinued. the products also have similar weights 500gr and 470gr
http://bmwfans.info/parts-catalog/31126763719
http://bmwfans.info/parts-catalog/31120393540