I custom made these for my car, but decided I didn't realy need the adjustability and went back to a delrin offset bushing. I ran them for over 2 years, with 2 track days on them and had no issues at all. I put brand new spherical bearings in them about 2 weeks before I pulled them off the car, so the bearings are still like new. To adjust you just unbolt the block from the chassis, and thread the rod end in and out to get your desired caster angle.
With the jam nut and rod end threaded all the way in I got -9 degrees of caster out of them on my 85 e30. Asking $125 shipped (these are a racing part only and not intended for street use)
http://www.r3vlimited.com/gallery/files/7/4/5/1/PICT0001_146240.JPG
http://www.r3vlimited.com/gallery/files/7/4/5/1/PICT0003_305.JPG

This should work for E36 too?

ya if the e30 and e36 share the same mounting for the control arm bushing then yes.

Sold