This is a LEGO Minifigure Wall Mount which I recreated and adapted for my needs in Tinkercad ( https://www.tinkercad.com/things/2URlnLa77qX ).
This should also allow anyone else to make some adjustments if needed.
I created multiple versions of the wall mount, different versions to mount them, different baseplates and stud sizes. The version with the larger studs even holds the minifigures without an additional base blade.
Before you start printing dozens of them, make a test-print, compare the measurements of the design with the printed object and adjust the print settings.
I had to increase my print values by approximately 1% in all dimensions to get the perfect result.
This is very important, 0.1-0.2 mm make a difference in holding the minifigure properly without the need of a base blade.
The author remixed this model.