who sells the little white protectors that go around the emitter?

I remember someone posting a link to these little white protectors that surround the emitter and prevent it from shorting with a reflector in. Not sure if this makes sense lol. But if anyone knows what I am talking about, can you link me to who sells them?

I need them for my tr-801/mrlite J4/yezl z1 and similar sized lights.

Thanks again BLF members!

I bought mine at KD (16mm 60 pieces 3.99$).

I also got my isolators from KD. Before that I just made makeshift ones with a hole punch and a sheet of labels.

If you just want a few, PM me your address. I think I have a lifetime supply of the KD ones - a cheap alternative is the ring reinforcements used for punched paper in ring binders.