just found this, think this will work for the rear?

SPC Performance 75800 - SPC Performance Camber Shims - Overview - SummitRacing.com

 

I have them on my car...but I have a GD3. They are great, but you will need to make friends with the guy who has the alignment rack because you will have to do it at least twice...it never comes out perfect the first time. Check out my profile, I have an album there that shows how I installed 1-1/2 of these shim kits on my car. Since they only adjust out 1.5 degrees, I needed to "correct" 2.25 degrees.

I don't have a GE8, but I've seen here on FitFreaks that the GE8 rear stub axles are not bolted on...check that out...