Whew! That was a capital-P Project, but I finally managed to recreate your design from scratch in Fusion 360, export profiles with the Colorific post processor, and after a few of the expected screwups, I got one that fits together perfectly with the Draftboard I have at hand.
Here’s the link to the F360 project:
https://a360.co/2lmrNQ8
And the SVG:
Thanks again for making and sharing this thing. Besides having a cool lamp, it turned into a great learning opportunity.