Has anyone seen such a beast? I'd like to use It with my phone (USB-C) and my DAP.. I've done a bit of searching, and haven't found anything that foots the bill.

I picked up a Onyx Boox Palma, the 6" e-ink tablet from Onyx, ostensibly to use as an Android-based e-reader (It runs Android 11) running Kindle and a few other apps. It has WiFi, Bluetooth, and USB-C. It's US$279.99 from Onyx, or the usual superstores like Amazon. It has a microSD card with...