Sadly I was stupid enough to be careless with a pair of Monster Dogs with +red factory lenses: I left them on a plane that landed in London the week before last. If anybody happens to see a pair of those for sale (the frames are matt black and the insides of both arms are bubbling/peeling), or happens to have a pair of factory lenses for sale or trade, I'd vastly grateful to hear from you.

As the kids (used to) say, "BUMMER".
As I always say, "If they aren't on your face, you can lose them".
Good luck.