The author remixed this model.
A remix of the back part of @TeachingTech generic enclosure CYD enclosure to mount to 2020 extrusion especially the ender 3.
Please do check out his video on the CYD display and working with klipper. It's easy to install and gives you an amazing interface for the klipper software.
Here's a link to the CYD display I purchase from Aliexpress for less than £9.
https://s.click.aliexpress.com/e/_Dkzx5Zj