I modeled this just to see if it would work. I know you can buy them aftermarket but I feel that a 3D printed one would be more robust. I'm including the Fusion f3d files so you can modify the model to your liking. 

Update: 6/28/25

The external threads on the lug nut are M27x2.0 but when I printed them they were too tight (might be my calibration) so I made the threads M28.2.0 and they worked a lot better. I added both models so that you can try both.

Update: 9/4/25

Mine failed under the hot summer heat with PETG so I had to reprint in PC. Hopefully Polycarbonate will hold up better.