Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:3310600.

I remixed the top part of this design, I tinkered some Skip-Bo elements and 2 pairs of recesses on top and on the sides for better handling to it. The locking tabs of the bottom part are modified slightly. The bottom was really a tight fit in the original design, so I reduced the lateral dimensions of the bottom by 0.8mm. Slides in easily now and still provides enough space for the cards.