Yeah that's a ripoff from the dealer, to the surprise of no one lol. I think the "real" fix for the rear camber issues is to replace the worn trailing arm bushings and rose bushings, and if necessary replace sagging rear springs (and shocks of course). I did my trailing arm bushings recently. Rose bushings look more involved.I have an 07 95 Aero, and can tell you that the rear camber does make a difference. Mine were off a fraction on the RR, and ws burning through tires , right to the core, every 500 miles. Might be your problem.
What irks me is that those little shims are $136 for 4, from an OEM/dealer. You can get them from eEuroparts for $6, or make them yourself with SS 1" strapping from the hardware store for $1.25.