At least in the United States, Speedo continued offering their men’s thong well into the 2000s. It was a bit of an anomoly; I don’t recall ever seeing a Speedo brand thong for women, and, with the exception of the Solar 1" brief, most of Speedo’s swim briefs tended to be more conservative. I’d be very interested to know the story behind their men’s thong. Was it some executive’s pet project, or was there actually enough demand to justify including it in their catalog for such a long time?
Turbo and Jolyn make women’s swim thongs, and the brands you mentioned all have cheekier cuts for women. I doubt, however, we’ll see a similar trend in their men’s swimwear styles.
The Todd Sanfield Shore Thong is the nearest equivalent I’ve found. The Charlie by MZ Swim Thong is also a good choice if you prefer a classic style. I’d love to see mainstream brands offer men’s thongs, but I’d worry that they’d hold back and make something a bit too square.