In fact, I made my own. It’s fugly and dorky as hell, but it’s everything I want and nothing I don’t.
I used a VuFine LCD eyepiece and hooked a raspi Zero W to it. Input via Bluetooth keyboard. Not a lot of screen real estate, so I went full CLI and wrote my own TUI with widget support so I can have an “active” app, plus a bunch of passive data widgets.