I was looking for the same thing earlier in the year. There's this <http://www.bikeforums.net/showthread.php?t=300122> but not much info there.
I contacted HPM in Eugene about a Swift Frameset. They wanted about $100 or $150 less than a complete bike; I don't remember exactly but yes, they would do it. At the same time I contacted Peter Reich and the only thing he had was the aluminum but that may have changed since it was several months ago. I ended up buying a complete steel bike from HPM and an aluminum frameset from Peter.