Radio
#2
The only way to replace them is to solder in new bulbs (or LEDs if you choose). Here is a thread about replacing burnt out headunit bulbs with LEDs:
https://ls1tech.com/forums/wiring-stereo-electronics/113734-ya-think-i-m-gonna-buy-head-unit-when-i-did.html
https://ls1tech.com/forums/wiring-stereo-electronics/113734-ya-think-i-m-gonna-buy-head-unit-when-i-did.html