Dualstrusion Catan Harbor Tiles
A remix of rbuckbailey's harbor pieces designed for dualstrusion printers so you can get a nice crisp contrast between the background and its number, without painting. I recommend a blue bottom and colors to suit the material -- black for wild, red for brick, brown for wood, white for sheep, yellow for wheat, and grey for ore.
Print as many as you need for either the 3-4 player game, or 5-6 player game.
I've included the SketchUp files for further remixing. Note that the import process from rbuckbailey's stl makes a messy SketchUp file, and while I did some cleaning, they're still not as nice as if I had the original source (or had done it from scratch).