Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:4474177.

This is an organizer for the Mayfair edition of Tigris & Euphrates (the version with the wooden discs for dynasty markers).

To store everything, you will need to print four dynasty trays and one of everything else, but because the dynasty trays, monument tray, and points tray are all based on the same geometry you could also print two monument trays and skip the points tray if you prefer. Since the design is largely modular you can arrange the trays however you like.

The trays are designed to fit perfectly into the box with the cardboard "well" that comes with the game but if you've discarded that you could easily print some rectangular spacers to fill the gaps. Similarly, my box has approximately a 1cm gap when packed which could be fixed with a spacer placed below the trays.