As i broke 2 of the OEM red plastic parts from my keyboard, i modeled the broken part and it works very well. 

For print settings, I used PLA and reduced the speed to 60% on my Prusa MINI, although the part can still break easily upon printbed removal. 

To replace the switch, I dissasembled my keyboard, and removed the problematic switches. Opened them and simply replaced the broken red part with a new, 3D printed one. 

Compared to the original switch, it IS a downgrade, so I recommend just replacing broken ones, and moving OEM switches to most used keys, if one of those broke. 

This should also be possible for the purple tactile switches, but I do not own those to measure and test.