Cap showed up today and it does appear to be used. The "handle" is die cast and painted metallic dark brown, the cap itself is red primer. I scraped some off and it's gold iridium plating underneath, not chrome. Reason I think it's used is the rubber seal has a witness mark from the filler tube and, it's solidified. No biggie. If it was $50 or something, it'd be a different story.
It looks like I can use the "guts" from my old, aftermarket chrome cap. The rubber seal is fine on that one. Haven't tried to be sure yet. One way or another, it'll be taken care of.
One thing I noticed right away, the cap weighs 3 times more than the chrome one and the handle is much easier to hold onto.