QUOTE(coreypolis @ March 7 2007, 04:41 PM) [snapback]92173[/snapback]
Delkin makes one, its a full piece that fits on by replacing the eye cover. Never tried it though
I've got the Delkin, it has all the flaps and doors and I don't like it. The flaps are spring loaded so you have to fold both flaps in at the same time and close the door all the way so it will stay shut.
It doesn't help any in the sun either.
The best use for it would be an anti-chimping mechanism.