@AndyW got some yesterday now that I know what to look for and works awesome. I don’t think I’m even going to bother with shaping it and just bring out the light pipe straight to the enclosure lid.
The yellow wire is actually going to GND pin on the top. I probably could have left it underneath and connected to ground of the USB pad (?) but thought it would be easier to solder to the pin. Now I’ll also mention the RGB LED I had on hand produced colors varying significantly from the surface mount one. I double/triple checked the wiring. But the startup green flash was pink/magenta, and the cyan was also pink/magenta. My next steps if needed are to wire up individual LEDs or only one RGB LED leg at a time. At Digikey I couldn’t find through hole RGB LEDs that had the same specs as the surface mount one.
@ScruffR not sure I’ll need the breakout now for the LED, but may still need to have a solution for the button access (although if everything works smoothly users should not need to access the setup button hopefully). So I’m sure I understand your suggestion, is it something like the mockup below?
Mockup of mini breakout:
Light pipe in action:
