Here is where allot of us get 'em http://store.summitracing.com/default.asp?target=/egnsearch.asp&N=400230 They have a great way of finding what you want.
Got mine from Wheel Vintiques . I was living in North Carolina at the time, ordered custom offsets on a Wednesday, and the brown truck unloaded them at my place on the Thursday of the following week. Dig.
I had good luck with Stocton Wheel. They built the wheel special and had it here when they said they would. Clark
Jabber said he was happy with these guys, and I'm thinking about gettin a set from them. http://www.earlywheel.com/
I had bought a pair of 16" steel plain wheels and while the rim it's self is fine the weight is insane, they feel like they weigh 100 lbs each, I did not use them but if weight is no concern then Vintique isn't to bad.