Model made by me on siemens NX, it consists of three pieces and assembled as shown in the figure below. I made four printing profiles, two of them containing 20 cards while the remaining two 10, for both versions I made the multicolor and single-color pattern. For the multicolor version I recommend that you make piece 2 not of white material, otherwise you can see the color of the layers underneath, as happened to me.

Piece 1 should be assembled together with piece 2, it fits together perfectly but I recommend using plastic glue for a perfect seal. Once these two pieces are assembled, they should be inserted into piece 3.