Overheard these shoes on one of my favorite cycling specific internet discussion boards (by way of the Miami cycling blog, La Rueda Tropical). Available through Cycles Alex Singer.
And here’s a link to another source for dress cycling shoes (to wear with your Bicycle Fixation herringbone knickers). Shoes by Dromarti (was Marresi?).
Addendum: a nice photo of a pair of vintage cycling shoes on Guuwatanabe’s flickr photostream.
And a snap of ST’s vintage, MTB Sidis