Hi,
"Febi Bilstein"aka Ferdinand Bilstein have never been,and I hope,will never be OEM to anyone of the car manufacturers...Not to be mistaken with "August Bilstein"-the shock makers,acquired by Krupp-Thyssen. Other brand with the FEBI level of "quality" is Vaico/Vemo,and ,to lesser extent,SWAG,Meyle(what they do is to wrap on their package the production of countless subcontractors and sell them MUCH cheaper...The ugly thing is that these "brands" are Germany-based Not to mention their various italian "colleagues"....Good luck!
P.S. I`m sure the mounts supplier to MB(maybe from the early 50-ies) is Phoenix AG(Megi is their automotive division)-a visit to their site and you`re sure the guys know what they`re doing...