For any folks still out there using the #Rockbox firmware, I recently discovered the Hifi Walker H2 which is both officially supported, and more importantly, still being manufactured and sold. Flashing takes a bit of patience if you're #blind, but it can be done.
https://www.amazon.com/HIFI-WALKER-H2-Resolution-Bluetooth/dp/B072C4YPCG/ref=asc_df_B072C4YPCG