modretro has new ones

https://modretro.com/products/chromatic-tetris-bundle

you can find cheaper ones on amazon/temu too

The Chromatic is an awesome experience to play. The HTMX 4 game has an auto-loader which immediately drops you into the game at your last checkpoint. Since the Chromatic has no boot screen, you're back in play within a second of powering on the system.

Do they license from Nintendo or something? I thought this kind of stuff was lawyer bait.