I have been investigating wheels recently, and when I was quoted over $800 a corner locally from a common AU supplier....I started searching the forum
Team III looks ok, although it looks like 17" is their max although I will ask them - but check out the prices, USD360 a corner!
http://www.team3wheels.com/ac/
at that price I could order a set, screw up the spacing, get a second set and probably still be in front!