If it is really such a 'shitty problem' to someone, they can easily solve the problem by optimizing their job search for a high private:shared equipment ratio.
People share equipment in every office everywhere. Germaphobes will need to disinfect some stuff, they can't have private everything, and they can't demand that people stop sharing things. Oh well, them's the breaks!
That's a horrible solution for a couple of reasons:
#1 - Ewww (yes, I know most people are sanitary... most)
#2 - Straight keyboards vs curved (and similar for mouse, etc). Both for working effectiveness and RSI.
Or have the employee keep a container of them at each station (if they don't already, which IME many do).