You don't have to spend $500 dollars on a rear alignment kit. You can get rear camber arms from SpeedyBenz. He's the only one making them now. They cost about $200. I have similar set from a company that use to make them and they work very well.

Go to this link to learn more. You'll also find SpeedBenz and learn what happened to the company I bought mine from.
Soon to be released chasis tweak

Pictures and discussion:
http://www.bnzsport.com/forums/index.php?showtopic=9104&hl=camber+arms


Also you can get the alignment pretty close if you are lowering with Eibachs with no original spring pad change So you don't have to get the camber fixed immediately, just have the tech get the alignment as close to spec as possible then save up, buy them, and go back later .