Due to demand I've posted the files used to mount the original design to a car's cd tray.
The holder is designed to fit my particular cd tray so you may need some adjustments.
This holder also uses parts from "Modular mounting system" and "3 DOF Axis Change Connector" to get the exact position for the phone.
If you're going to keep this in the car all the time then you need to print it in ABS or some other temperature resistant filament.

Instructions:

• print all files included
• replace the car vent clip from the original with the adapter2.stl file
• select and print from "Modular mounting system" whatever is needed for your case to link the 2 adapters

Modular mounting system: https://www.thingiverse.com/thing:2194278
3 DOF Axis Change Connector: https://www.thingiverse.com/thing:2358873

F360 links:
https://a360.co/30i81UO
https://a360.co/30iEJFE
https://a360.co/2ZeG17p