A couple of new products from Wheeliant are two sets of Early Wheel Chocks for the U.S. Navy. They are cast in grey resin and come with simple details to set them apart. The instructions are adequate for assembly but give no painting directions.
Set 132-008, which is the "Blocks with Fixed Bar," comes with some small wire for the release fitting on the chocks. I had to drill and file the holes in the blocks to accommodate the bar. Only took a couple of seconds. Be sure you adjust the blocks to the wheel dimensions you are going to use them on before gluing the release cable and holder (piece # R-4). They are a sloppy fit and require a little more glue than you might expect, ultimately fixing the bar in place permanently.