I've been looking at a ton of bar mitts / moose mitts and I can't figure out if anything will work well with bullhorns?
Does anyone have any good experience with this? If it helps, I'm using CX style brakes, not TT.
Sounds like it's time for some custom design work. I can't think of anything that I have seen that would work on those kinds of bars. You might search the net for a bike messenger forum and see if there have been any successful designs. Or check on the fixie or single speed forum. Even though these are winter issues someone might have posted something on them there.
You might try the mtbr.com forums. They have a commuting thread. You can try the commuting thread here too. Some use these bars on commuting bikes.