Great topic, I've always loved this fight. Terence Young certainly had a fetish for catfights. War Goddess was another of his films that features great girl fights. My personal preference is still One Million Years BC because the fight is allowed to go through to the end with a clear winner. Both of these fights (FRWL and One Million Years BC) were incredible turn-ons when I was a kid in very early puberty. I'm in my sixties now, and these two movies, among others, (like the 60's Avengers series with Dianna Rigg) were tremendous sources of girl-fight fantasies back then, and when War Goddess appeared, it brought catfights to a whole other level, 2 fights in that movie between the same girls.
I agree that any remake of FRWL would not be nearly as sexy. It would be some kind of martial arts-karate fight, not at all my what I like in a girl fight. I still like the old style catfight and it turns me on today as much as it did all those years ago. I don't care for real fights, preferring fights that are staged but look real, like the movies we are talking about. Real fights mean girls getting hurt, which I don't care for. Make it staged to look real, with a clear winner and a victory pose.