Hey,
You absolutely have to check out Joe Nocella from 718 Cyclery in Park Slope Brooklyn. He's a really down to earth guy and makes some SICK bikes. His website is 718c.com. He specializes in fixed gears, new and old. The best part is that his prices are extremely fair. He doesn't charge extra for parts and the best part is that you get to be part of the build experience. Each bike made the shop is completely different, so you're guaranteed to have a quality one of a kind fixie. I definitely recommend him as a very satisfied customer.