I modified the backplate of lindnjoe's Harley Light Box model to be compatible with the Bambulab LED Lamp Kit 001. The tolerances are designed to be tight enough to allow a press-fit installation of the lamp. Additionally, I added a white layer on the top surface to enhance reflectivity, though this step is optional.

Additional Info:
The original backplate, which I worked off was a loose fit to the main body. I ended up using superglue in a few spots to bond them together after installing the lamp.