This is a remix of the original card keeper model. I increased the size and added a side support post. Its not perfect - but usable for sure. Edited in Tinkercad. Added tab to label the deck.
Printed in PLA with 20% infill and 3 walls @ 0.2mm layer height
Tree supports painted on the long side of the bottom model and the corners of the top model
No brim
Fuzzy Skin Optional - make sure to iron the top most layer so they still fit nice together