Please help - need to identify/replace a bulb or bulb assembly (A body rallye dash AC/heater control)

Hello FABO. I'm hoping someone has been through this before and can help point me to a source or solution. I am in the process of restoring the rallye dash bezel/gauge cluster out of my '71 Duster 340 4-speed. I am getting near the end of the project, but still have not been able to find a replacement bulb (or more likely bulb/pigtail/mount assembly) that lights the AC/heater control buttons:

AC switch.png

It looks like to me like the bulb portion is not removable and it is intended to be replaced as a complete unit with the single mounting screw, but I have had no luck finding this on the Mopar bulb chart I have, on the any of the repop part seller websites, nor with a variety of Google searches. The original bulb is stupidly dim and I'd really like to replace it with a brighter option before I put this all back together. Hell, an LED replacement would be ideal, but I feel like that is wishful thinking. Any help I can get figuring out how to get one would be amazing.

Or if anyone has substituted and/or fabbed something that works just as well or better than the original, I'd love to see it. It does not seem like it would be all that difficult, but I tend to overthink/overbuild stuff like this rather than just using the KISS approach. I'd be willing to bet there are some MacGyvers out there that have done it with some chewing gum and a paperclip.

Thanks