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The closest thing I've seen to having a LED ring in a built-in array with driver is the NeoPixel, but the 12 LED array is 37mm in diameter, larger than a vandal-proof switch. As you can see they're already tightly packed so you'll need to reduce the number of LEDs without going with a custom PCB design.They're made with SK6812 IC packages to control each LED. WS2812 is another one with similar qualities. Mini versions of both exist, but I haven't seen any sold in a pre-made ring array.
The closest thing I've seen to having a LED ring in a built-in array with driver is the NeoPixel, but the 12 LED array is 37mm in diameter, larger than a vandal-proof switch. As you can see they're already tightly packed so you'll need to reduce the number of LEDs without going with a custom PCB design.
They're made with SK6812 IC packages to control each LED. WS2812 is another one with similar qualities. Mini versions of both exist, but I haven't seen any sold in a pre-made ring array.