Smokercraft trailer, one of the snap-on side lites (clear plastic cover for marker lights) was broken. These fit perfectly. I printed mine in Prusament Orange Transparent.
How to print - One of the shapes in this project is a negative volume modifier. One of them is a regular part. If you import the .3mf file into your slicer and it slices out to a solid block of plastic, you missed assigning “negative volume” to the inner part.
The author marked this model as their own original creation.