Boxes I made go well with the chip insert (230_Box.stl) made by DietDrDiabeteez (https://www.thingiverse.com/thing:6454047/files).

The base for insert is made in Boardgame Insert Toolkit (https://github.com/dppdppd/The-Boardgame-Insert-Toolkit), I provided scad if you want to tune it to your needs.

The lid for the money box has been altered with image from: https://freesvg.org/race-horse (Public Domain).

Money boxes are complaint with the protectors I made check them out in https://makerworld.com/en/models/428085#profileId-332117