This is a modified version of a controller stand found on Thingiverse originally made by Brian Denis (laughingdoctor), I've added a slat wall mount that should be relatively compatible with any popular brand of slat wall.
I used:
Layer height: 0.2
PLA or PETG
20% Infill
Minimum 3 perimeters
No supports
No brims/rafts
*I would recommend adjusting the width of this depending on the size of whatever you are trying to mount.
The author hasn't provided the model origin yet.