It is hard to tell what is wrong based on that picture. It almost looks like someone broke through the little fstop/shutter speed window with a screwdriver and pried up, bending the metal. If nothing is damaged underneath, I'd take the front panel off and bend it back and repaint it, then make a new little window out of plastic.
If it really bothers you I'd consider selling it and getting another. Though it looks like you already have a second one.
Who knows, maybe there are some spares out there. I do have a spare NOS meter cover and have seen those up for sale.