Hm I was thinking about getting some Hella's, and IIRC the lenses are glass on those too, but I was thinking maybe a thin sheet of plexiglass or lexan or basically any thin yet strong sheet of some sort so I can cut a hole in that and maybe place it slightly ahead of the fog in the housing just to protect the glass lens. Sort of like my brothers '99 Cougar, which apparently has projector fogs (stock?) and just a thin sheet of plastic covering the opening.