Dice Tray and Box inserts
thingiverse
The original post suggests using fabric and foam for the inserts, but I created 3D printed ones.
Download Model from thingiverse
With this file you will be able to print Dice Tray and Box inserts 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 Dice Tray and Box inserts.