I was remixing https://www.thingiverse.com/thing:3094427 by FixingKitrty, and I decided to go ahead and make a tray for Mint Works while i was at it. I designed it in Tinkercad

Edit: I only have the second edition, and I've heard that the box was redesigned for it. If you have the first edition, you probably won't be able to make it fit with the mints upright.