Retroid Pocket 2 Controller Handles
thingiverse
I actually haven't tested this but it should hold the Retroid Pocket 2. Let me know how it goes.
Download Model from thingiverse
With this file you will be able to print Retroid Pocket 2 Controller Handles with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on Retroid Pocket 2 Controller Handles.