camber bolts are almost a good idea - they are a bolt that fastens the hub to the strut that replaces one of the stock ones on each side (there are two per side). The bolt is thinner than a std bolt and has an eccentric raised section in the middle - the idea is that you turn the bolt head and get more or less camber, locking it in position with the nut when its where you want.
Eibach do em, whiteline do em so anywhere selling these should do em
except they dont work very well on VW's - shame, as its almost a good idea. But they would give you a bit more slack than a std bolt if you needed a bit more camber but like has been said alreeady, you can already get about +/- 2.5 degrees with the stock bolts
Expensive struts like proflex have a similar system but just better engineered, one that actually works
http://www.proflex-shockabsorbers.com/mainindex/mainindex.htm