Umm ... This is 38cm bullhorn I built from scratched up B123. Plenty of space for two hands.
I can do 37cm, as I have ridden on a track drop of that width. It would certainly be better than pulling a short straight bar. I would like to fit a break lever in, so I can't go any narrower. I know at 35cm, the hood would be completely smooth curving (no straight part); which could be quite beautiful depending on your setup.
You can get a crmo version runs from 340-420mm. ... You know you might not wanna cut the thing, ...
http://pedalconsumption.com/files/ne...drop_bars.html
See?