Thanks again to the OP for the walkthrough. It took me a year to finally carve out the time to do this. And now have done it twice.
First try was with a grill from customcargrills.com. I liked the mesh, and it was the right shape, but did not fit at all and needed a lot of trimming. Which I didn't have patience for once I finally finished it, so it all went back together (picture with lights off).
After two days, I hated looking at it and sprung for the much more expensive Grillcraft version. This one is cut correctly and is a much sturdier piece. So the second (and final) version is the one with lights on.
I don't know if I've posted anything since my 3rd gen, but I love this forum! Thanks to all for such a great resource.