I found a lot of similar designs for dice boxes on Thingiverse and other products, but found that since they really only hold 1 set, they're a little under performing for me. The middle piece in this can be printed as many times as needed to make room for extra dice sets, or omitted completely to use just one. Currently, the design is only available for peg connections, and may need tweaking (I'm currently printing and testing it). As soon as possible though, I'll upload a magnet compatible design, probably 8mm diameter by 4mm depth.

While I designed it similarly to other "things" on thingiverse, I created the object from scratch, and use no other files or resources in my document, other than the Dungeons n Dragons logo.