Are there any CO2-Laser notch filters? [closed]

I'm searching for a notch (band-stop) filter (like [1]) for a 10.6 $\mu$m CO$_2$-Laser and I have yet to find one. Is there some physical reason such filters don't exist or is there just no demand?

The use case is to protect a far infrared camera from accidental laser reflections.

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closed as off-topic by Carl Witthoft, ACuriousMind, MAFIA36790, Gert, Kyle KanosNov 18 '15 at 16:23

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Have you looked at laser safety goggles? See what they do for protecting against CO2 or similar IR sources. – Carl Witthoft Nov 18 '15 at 13:45