No, I know exactly what you mean, since I am into pro-video I assume you mean something like this-
Vello 3.5" LCD Hood LHV-3.5 B&H Photo Video
I agree, that may work, but like I said, you may have a hard time seeing it with that size, 3.5". Can't wait to see what you come up with tho! Good luck and let us know if you need any help!
-Dave