I play American Truck Simulator (ATS) and Euro Truck Simulator (ETS2) and have keys for my little sim rig, I wanted a Set for either game and found plenty of European numberplate keychains but no American ones, so I made this one up.

The state plate I thought would model easy and look OK in 4 colours was the Colorado Plate, I hand traced the mountains in Fusion360 then added the text and extras. All parts are separate so you can change colours easy.

The font used is the free FE-Font, Easy option is to delete the included name and add your own using the Slicer Text Option, but your font choice will be limited as they don't allow custom fonts yet.