I don't know if anyone makes these, but I can't find a source if they do exist. Basically, I'm looking for normal road brake levers that clamp on like CX levers do, with a hinged clamp.

Right now, I have a set of Tektro CX levers on my bar, which I can easily take off for the times I go to the track (on the road I ride SS): PIC

I'd rather have normal drop bar levers, since they're easier to get to when riding in the drops, where I spend most of my time. But, I'd like something that quickly clamps on/comes off, instead of having to remove bar tape and slide them into place.