I want to raise the eibach rear end by about 2 cm to be about a cm higher than the front GK springs. i was thinking, instead of looking for springs from other cars, to have a triangular spacer carved that go over the rear strut mounts.

that way i can buy wheel spacers and extend the wheel base without having to worry about fender rubbing. what do you think i could do? perhaps a machine shop can fabricate them for me if i send them a strut mount?

 

How much strut mount stud do you have showing? You should be able to make a spacer yourself out of aluminum if you have enough threads left to allow the nuts to thread all the way on.