Try an Ethernet-to-WiFi adapter. I think that's the easiest solution:
Thanks. WiFi is not essential, just a nice to have. Would make it easier to move from one TV to another. I have wired ethernet within a few feet of the two TV's where I might use the box. If I am unsuccessful in getting the remote to work, I'd rather buy an air-mouse / mini-keyboard that comes with a USB RF dongle: https://www.amazon.com/dp/B0FGJ9YFH9