So, really like the new plastics - bought the Proliferation box, because I like the Primitive look (and the Coyotl re-design I did for another player's design challenge), but they deserved something more than the plastic organizer I used to carry around with the metals.
Since I had this plastic ammo box my wife and I were trying to use to lock up the kid's tablets and Nintendo Switches I spray painted it (to cover the kid's doodles) and got some camera foam to put inside.
I have quite a few more - but the old metal needs to be stripped and repainted.
I'm actually quite happy with this - I'm not especially crafty, so this is a fair acheivement for me.
(FYI, it might have a space for a lock, but the plastic bends enough for 10-yr-olds to pull out their stuff anyway.)