In May I already shared here that I worked on the BTClock (#175847). Together with another bitcoiner we designed a kit with a custom made PCB which you can order on the webshop, so you can build it yourself. To build it you do to order the ePaper displays and the ESP32 (Wemos S3 mini) on AliExpress.
On the wiki there is a step-by-step guide. Also there is a Telegram-group where users and builders can ask questions and ask/give support.