Thanks for more info @louisbosco . If I was looking for a pair of acetate specs I would be more wary about buying without getting fitted, but wire frames are much easier to shape after the fact, and I trust my local optometrist to be able to make any small adjustments that might be needed. As for looks, I've been a round-lens wireframe wearer for about as long as I've been wearing glasses—the St. Titan Bostons are just the better crafted versions of what I've been wearing for a long time now, with a few minor changes to the shape.
Visual Culture was going to be my backup plan, but I actually just set up a special order through H Lorenzo! They stocked some of their sunglasses in like 2017, and to my knowledge are the only people who have ever stocked their items in the States. I was very happy to hear they had a relationship with HM still.
I was also confused by their dwindling number of stockists. Maybe they just got tired of all the Beatles fans filling their inbox, and decided to keep it local for awhile…..
[Putting it into words for future forum searchers; I was able to special order a pair of 白山眼鏡店 Hakusan Megane glasses to the United States through California retailer H Lorenzo, by emailing their info line. It was a little difficult to get a pricing estimate out of them, but I'm happy to share our correspondence if anyone's interested in doing the same thing.]