For TVs Up to 75"
Amazon Link:
https://www.amazon.com/ECHOGEAR-Articulating-Bracket-Patterns-Extension/dp/...
You'll need your own wall screws and I'm missing the circled pieces, but that part is not load bearing, so you can easily add a custom piece there. It's just to keep you from being able to lift the TV up while it's mounted.
ECHOGEAR Articulating TV Wall Mount (Cascade)
This offer has been gifted to someone and is no longer available.