I remixed Bench Block by entomophile. It's basically identical. I reverse engineered his .STEP file as a new Fusion 360 model, just to fix some minor geometry errors that were giving me print problems.

Fixing these errors allowed me to print the model with the V groove for barrel work on the bottom, so that it would print well without supports (the original didn't print well that way, because the supposedly-planar top surface areas were not quite planar.)