Moog could make a daughterboard that has rocker switch on it. They could then also supply a drill bit, and nippy cutters to cut a space between the mod and pitch wheels.
Or better yet just a regular ON/OFF switch that has leads on it and you could mount the daughterboard into the cabinet.
I am creative, but its not a question of creativity! Its practicality! This isn’t like switching out a memory board, its would require extra space that may not be available and changing the face of the Voyager. The factory would have to do it, they would not have a kit. Adding knobs and switches! it ain’t gonna happen…
…and you got to ask, how many people would really want this upgrade? I don’t feel like I need it and I think most would agree, especially since it would cost a lot!