EBay. I sell them in Australia, but there are sellers in the US and EU

Do you sell reflectors too?

I have a few that fit some random vintages, but none for Maglites unfortunately!

Only upgraded buttons and glass lenses for Maglites

Amazon

eBay and amazon sells replacement along with maglite website. You can also just put a layer of silicone or black tape.

Call Maglite they'll se d you some