I am doing this project right now:
I have the adaptive headlights, though, so my outer ring cannot be attached directly around the HID eyeball, but the bezel instead. I also wanted complete rings; not horseshoes. I looked around and found Umnitza Orion Lite LED Halos (120mm outer; 106mm inner). The inners fit exactly inside the high beam pocket, and the outers fit precisely along the low beam bezel lip. I have tested them; they're quite bright, and look great! I got some LEDs to replace the incandescent side marker bulbs, so we'll see what happens when it's all put together.
I'm getting ready to paint my long-term RRS S/C to Overfinch DIY project. It's been an incredibly arduous process to get this kit to fit like factory, but it looks fantastic. I'll update that thread soon.