BTF-LIGHTING WS2812B IC RGB 2.7mm Ultra Narrow LED Strip 0807SMD DC12V Individually Addressable 3.2FT 160Pixels/m 160LED Dream Color Tape Light for Home DIY Decoration IP30 (No Adapter or Controller)

So this is gonna be much less clean when the LEDs are off, but you can clip one LED off each segment on this strip and you'll have an addressable LED in there. I think it'll fit. I've been able hide them really well. https://a.co/d/5lXJgmq