I was able to pick up a pretty nice specialized brake lever from my LBS on the cheap. The only problem, however, was that the clamp size was too big for the set of drops I wanted to put it on. I messed around with a couple ideas over the past few days (mostly including scraps of bar tape used as shims) but none really worked. Finally, I went digging through the spare parts bin and found and old Oury grip. I cut it into quarters and rolled one of the quarters onto the bar, clamping the lever over it. Once the hair spray set, it became totally solid.