The box looked like this:
Dave
South African ammo boxes dubbed "wolf boxes". Standard for African-based overlanders.
I've seen plenty of inserts for them. Everything from a 4-person dinnerware set to camera cutout foam.
However, the cost is unbelievable for shipping to the US, so they are rare and sell quickly when someone does get a bulk quantity in country. Also, numerous complaints about the poor craftsmanship of the clasps, and breakage in moderate to heavy use.
There are quite a few US-based options that will cost less and offer more, but don't have the "classic overlander" feel to it.