I just bought this game and couldn't find any organizer models available, so I decided to make one myself. The tray includes separate slots for each of the 4 types of highland tiles (top row,) 4 types of lowland tiles (middle row,) and 3 types of barren tiles (bottom row: regular, fracture, and special.) It also includes a slot at the top for the player color rings, though these can be left on the frog figures as well.
The game box is wider than my printer so this includes a separate spacer box since the terrain tile organizer tray can't cover the full width. There is about 2mm of play on each dimension so it won't be a tight fit even with a poorly calibrated printer. Note that this is a fairly large model. It took 13 hours for me to print even after some settings optimizations that left defects in the top surface.
One note: The tiles will sometimes get a bit stuck somewhat tilted in the tray, but rocking them back and forth down the length of the tray pocket will straighten them out pretty quick.