Since Apple totally ignored adding a real sleep timer to AppleTV, I decided to take matters into my own hand. I have some Flic buttons integrated into my smarthome setup, and was able to get Flic to set sleeptimers using Alexa and Harmony remote. I wanted to be able to easily use the button with the TV remote, so this solved my issue. Fits snug and doesn't slip off.
Designed in Shapr3D.
The author hasn't provided the model origin yet.