http://www.agpturbo.com
Excellent company. You can order online, build to spec. I bought my T3/T04E from them. When ordering, I was presented with many options, ranging from bearing selection, through trim and A/R selection, all the way to whether or not I wanted a polished exhaust housing (Bling!). In standard form, my turbo was only about $750 bucks, shipped.
Also, with AGP turbo you can call and talk to a person, something that always eases my mind.
They're located in Pheonix.