I've done some research and found some possible remedies for the negative camber issues.

http://www.kmac.3X3design.com/cms/index.php (front) and http://www.speedybenz.com (rear) were recommended by some Merc owners.

HDDP also found this product from DC Product No. 5140876AA which is a camber repair bolt.

I have sent K-mac and speedybenz emails if this thing will work with our Crossfires.