The Initiative Boardgame Insert Trays
thingiverse
Nothing fancy, but gets the job done. Works for vertical storage too. Stack the tray for the mission cards on top of the tray for the tokens, then lay the plastic "decoder" stand on top. The card box has 2 compartments, resource cards go in one, other cards go in the other one. The lid is a little tight, but once you take it on and off about 5 times, it's just right. It's meant for unsleeved cards, but you could increase the dimensions to fit sleeved cards and it should still fit in the box though.
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