Apparently American amazon and eBay has banned the things or lost inventory.
Can’t find them anymore but they used to be all over amazon. Creeping in with adds.
This site has them:
But they’re listing them for $799 and that’s probably before freight cost.
That’s getting into the price range of, “why not just buy a used Japanese factory brand?”
Still, I wanted to mention it because I was pleasantly surprised at the quality and power for the price of my son’s bike.