Here's the paper tape mod side on:
I don't think I'm up for a lighting mod myself but maybe I know how to get started: remove the shield, remove the mesh covering the opening in the outer shell, and install some LEDs in that little cavity, and then use some kind of semi-transparent tape to cover the shield vents and diffuse the light. Power is a problem. LEDs require more power to generate visible light than a typical headphone jack provides.
The poor man's version: glow in the dark or UV-reactive marker.
I had an idea for the sock mod: use the pivot pins to hold the sock in place. Here's a proof of concept:
Cotton sport sock material, even from thin socks like this, are too thick to work well. It binds the pivot pins and takes up too much space inside the pads. Something more sheer like dress socks or maybe even nylon stockings should work better but I have neither to play with.
I use the left side headphone jack. Shirt and jacket pockets are typically on the left side and that's where my players go.