DC actually was marketing a line of clothes with the Supergirl brand a little while ago; may still be for all I know... they were all pink, which struck me as a little weird. Perhaps they were for some reason concerned that Supergirl had the same logo as Superman so pinkness was needed for differentiation.

There was also a pink version of the Supergirl Halloween costume, which my daughter insisted on wearing; she knew it was non-canonical but she liked the pink, so what the heck.