Back when I was involved with hardmods.net, “rb” and I considered opening up shop and making a few kits to sell. There were a number of factors why it never happened but we actually designed and prototyped an LED ring for the Xbox 1. At the time there weren’t any LED rings on the market really. People who had LED Rings were basically making their own by hot gluing LEDs to the inside of their case. The effect was pretty cool, I actually had one setup with 16 blue LEDs at one point and another one setup with eight red LEDs in an “X” pattern. I snapped some pictures of the two setups in use with some custom laser engraved jewels from Xport, though the pictures really speak more for the quality of the jewels than they do for the LED ring.
The Hardmods LED ring was basically just a PCB that you would solder to yourself. What was interesting about our design is that you could set it up to to have anywhere from 1 to 16 LEDs mounted evenly around the ring. I’ve still got 3 prototypes sitting on the desk in my office.
I don’t have the schematics though. (rb, if you’re reading this send it to me please!) When I got the prototypes I also received a poster sized print of the LED ring layout with color coded traces. It had no dimensions but it’s the only documentation I ever had for the things. I’m not sure exactly where it is but I’m sure I could find it if I looked. It’d be no more useful than if I simply scanned one of my prototypes anyway.