Who makes 'em? I've got a set of Mavic GL330 28" tubulars on my track bike and need something in the 35-40mm range. Thought I'd be fine brakeless on the R2T, but I had 2 rabbits dash in front of me in about 5 miles, and caught a couple deers out of the corner of my eye in the brush!

The ultimate short-reach calipers are made by Dia Compe. They have a couple models of ultra-short reach, but if I recall correctly, it's the Gran Compe's (which came in a couple different configurations) that were all very short-reach:

https://www.yellowjersey.org/agc.html

Check www.yellowjersey.org since they usually have that kind of thing. You can also find them on eBay pretty frequently.

...this could be tough. the gran compe's are a minimal 37mm, I used my mycrometer, looks like no more then 35mm is what I need.. My best bet may be to get 39-49 arm's with a lot of meat at the top of the brake pad slot to file out 4mm. the Compes have that elliptical slot, so they are out. Thanks for the link, though. I emailed them, bet they know a solution. A reversed drop bolt (ala Sheldon Brown) may work too, but man it would look funky

are you going to have to drill your fork for this brake? if so, maybe leave it alone and get a secondary road fork you can more easily mount a normal brake to.