I modified @Sneaks Articulating arm mount to include a light ring. 

This is the light ring I used
https://www.amazon.com/dp/B00BG9IDB2?psc=

This is the power supply I used:

https://www.amazon.com/gp/product/B077PW5JC3/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1 

It is a snug fit, and may require sanding the printed circuit board to round out the edges. I left notches for the wires, and a place to stick a pry tool to remove it at some point if needed.