UPDATE 2024-02/13: added an stl of the bottom and middle as one print, removed the bottom and middle stls.
I liked the cardboard cable holder but didn't like to have to carry the cable holder, the charger, and a tiny USB-A to USB-C adaptor in a ziplock bag.
I looked at the cardboard holder and found a location where the changer holder would work if placed on top.
This version has gaps (USB-C and status LED) in the charger holder, so it doesn't have to be removed to connect the cable and see the charge status on the other side.
I designed a little storage space under the charger to store a small USB-A to USB-C adaptor that works well if you find a horizontal USB-A port to charge. Amazon tiny USB-A to USB-C
Note the parts should be printed in the orientation (for best strength) provided (all parts), and supports for the (top) part should be added.
There is an STL of the complete part to print as one, but supports will be required; I had limited success as one print.
The author marked this model as their own original creation.