WTB speedohealer or Yellow box
 

Turns out I would like one too - Any more floating around out there? Or perhaps Tweety and Reaper are on to something from the other WTB thread?

Steve:

Build one and save yourself some money and learn something about electronics. My interest has be piqued ever since I built one of Tweety's brake modulators. All you need is an inexpensive soldering iron.