I created my own camera mount and wanted to share my scad file.
My design is for M5x20 screws with nuts. In case you require different screw/nut sizes, simply adapt the values in the .scad file
HINT: The connecting part between the arm and the printer bends after some time or when the web cam is too heavy. HexDriver created a remix which fixes this issue: https://www.prusaprinters.org/prints/142759-prusa-mini-camera-mount-remixed . Additionally HexDriver needed a different camera fixation part, so if my camera fixation part does not fit your camera maybe the one from the remix fits better for you.
The author hasn't provided the model origin yet.