A simple pen holder mod for the Creality CR-6.
You can attach it to this:
https://www.printables.com/model/126838-cr-6-dragon-hf-sf-and-orbiter-v15-direct-drive-mou
Unscrew the 2 M3 that holds the hotend fan then completely detach the hotend fan.
Just put the pen holder in place of the fan and fix it with the 2 M3.
Print it from PETG as some flex is somewhat desirable.
You will need to modify some slicer settings. There are many “universal” guides on the internet that generally work well.
Kinda universal, but these kind of pens will friction fit (at the upper part):
https://www.parker.hu/parker_parker_royal_jotter_royal_blue_golyostoll#tartalom
The author hasn't provided the model origin yet.