I have a used set of 4 KMAC eccentric bushings for pretty much all the models with trailing arms in the rear. E21 - E28 - E30 - 318TI - Z3
I replaced these with weld in adjusters but they were working perfect when I took them out.
$150 picked up in Toronto or can ship if needed.
Turner sells them for $269 new. Here is a link to check them out.
I have some suspension bushings and mounts for sale in other threads if you want to do a package deal let me know.