If you google it, you will find mostly IR ones as it was one of the first used for NightVision but they are old now and Led Pills for them are not easy to find other than in China.
This was the updated version but it's old hat now too.
Opticfire CREE LED DELUXE TX-38 T38 torch lamping kit - Hunting torch kit includes everything needed for night time shooting - RED - GREEN - WHITE CREE LED pill
opticfire.co.uk
Use it with an IR led for my Night Vision.
There is others that go by the T name .
I have a T67 also but it's a little large to go on the rifle.