Sutherlands lists the Tange Passage with a stack height of just 30.6mm. Not only does the Tange web page list even more headsets than found in Sutherlands, but there are on-line retailers which offer a selection of them. They're real.
Of course priority should go to your local bricks and mortar bike store. Considering the number of shops that can operate today with NO threaded headsets on hand, the ones with some would be glad to liquidate seldom-requested inventory.
PS Velo-Orange's headsets are all rather tall.
Harry Travis Pine Barrens of NJ USA
On Tue, Jan 4, 2011 at 11:35 PM, MNF <email@example.com> wrote:
> Euro-Asia Imports has a headset made under the "Star" brand that was VERY
> short compared to the standard 35-40mm stack heights of the "standard"
> Campy-Shimeeno road models. Not absolutely sure if they still make a
> threaded version, but I think they did.
> Not on-topic, but this might do the trick to SAVE an on-topic frame with a
> too-short fork.
> As a last resort I have shaved a coupla millimeters off of the headtube and
> fork crown race seat. Not what I would have wanted to do at all, but
> sometimes you have to do what you have to do in order to get someone's
> franken-bike together.
> Mike Fabian
> San Francisco, CA