I had a request some time ago about trackballs.
Unfortunately this was in a cement factory with lotsa grind everywhere.
Frankly, If you want to get rid of a mouse, use either a tablet or an interactive monitor. (If you need a tablet, if an interactive monitor isn't sensitive enough).
I found trackballs more sentive to dust than cheopo mice which cost a couple of bucks to replace (not worth the time needed to clean them
.