I too could be interested in a bigger gearshift PEDAL/PAD (like wide & soft). Otherwise, the geometry of the original shifter is good.
As I commute daily, through lots of traffic, my big toe gets very sore from upshifting. Sounds funny, but it ain't.
Anyway, I am now trying a heel-toe shifter that I traded something else for. But, the angles of that shifter are all wrong. The toe piece cannot be mounted high enough (unlike the original toe only shifter.) This is limited by two things on the heel-toe shifter. First, a clearance slot just aft of the rotation/bearing. Second, the front ball-joint/attachment for the shift rod will hit the exhaust pipe. Also, with the heel-toe shifter, the heel pad is much too high, and cannot be adjusted separately. So far, my choices are a sore big toe with the orginal shifter, or clumsy upshifts with the heel-toe shifter.