Do you mean on the "Bastardized Maul" saber?
I assume that is a resin cast from the same pieces used for the Darth Maul saber, just painted black instead of silver. I have not heard that it would have been identified.
Edit: There used to be a great thread about identified and unidentified prequel greeblies, but I can't find it so I assume it fell off the board.
Roman's Empire is the well-known source for the red buttons. Replicated from a real one.
However, the way they are machined, they have a tiny "wart" on the top, in the center, which does not look so nice.
The LED bezels are stock electronic components. However, I think an exact match is yet to be found.
Lars is quite correct about the led bezels. They are a standard led housing type found at all decent electronic component suppliers.
They usually come in 2 sizes, to fit either the 3mm or 5mm led types.