I recently purchased a used steel frame Swift from Peter. I had him put dual chain rings 54/39 and a 9 speed cassette 11-34. The chain can be easily manually shifted to the smaller ring while riding, using your shoes. I would love to get a front derailleur on it. Of course with the steel frame, it might be doable.
If you are in no hurry and would like the Swift in a steel frame, you can contact Jan at Human Powered Machines. he seemed to feel that he could put a front derraileur.
http://www.catoregon.org/hpm/index.htm