Originally Posted by james_swift
The seatpost can be purchased from the Xootr Swift accessories page. As for the stempost, since you bring up the subject of theft, I recently had mine stolen on a rare day when I had to lock-up my bike in a communal bike cage in a parking garage. I emailed Xootr, and they sent me one pronto!
Much thanks to Steve@Xootr, by the way.
Also for the record, the Dahon seat post works quite well in the Swift and you can get it in carbon fiber if you are a weight weenie! In one of my photos (with Thudbuster and Brooks saddle) I have the Dahon telescopic seat post so that I can use a "normal" Thudbuster and not the special Dahon one.