Correct, I have not. But I really can't imagine Anatomy, which uses the same transfer, I'm sure, looks better than the superb Blu-ray. I do love the film, though.
I'm not sure I've seen a 4K of an older black and white film that looks any better than a great Blu-ray. Friends keep showing me this stuff and I've clearly seen no reason to start getting them. I may, this coming year, get a handful of things - like Vertigo and some large format films.