That's not ringing a bell for me, sorry.
There is this one, on a black background, white "S" with gray "outline" (actually supposed to make it look embossed).
It's the version used to represent the character Steel, who at one point was put forth as a possible new Superman when the old one was "dead" (that could be what your husband was referring to...?)
It would also be the only one old enough to have worn out, I think, as that storyline was 12 years ago :shock: . But maybe it's something I never saw. Anyway, if this is the one, you can order it straight from the maker:
http://www.graphittidesigns.com/shop/files/images_folder/t_33680_04.jpg