For trackpoint fans Lenovo makes a classic Thinkpad keyboard as a standalone rechargeable wireless keyboard. It works with Bluetooth, it's own USB wireless dongle or even wired USB. Has a switch for Windows or Android/Linux key mapping. I have one and like it (although it's pricey at around $100).
https://www.lenovo.com/us/en/p/accessories-and-software/keyb...
https://www.amazon.com/Lenovo-Thinkpad-Trackpoint-Keyboard-4....