Print four of these, one for each player. They fit in the existing insert space nicely and hold each character's tiles, mini, and series of little clue discs. The weird cutout space is for Jack's head/hat as he's slightly taller than the other minis. Put the location tracking pad on the bottom first, with these on top, then it's vertical storage safe once the board is on top.

My print in the photo is hashed as I print without bottoms/tops/walls to save on filament.