TS-03 Henry no longer being manufactured?

You can still find many Plarail Thomas engines on Amazon easily. Most of them, but not all, are around 20-25 USD, including Henry. Although, the originals of James and Gordon are around an average of 45 dollars, and discontinued ones like Murdoch and Duck are well over 80-150 dollars. But, on the plus-side, all of them as far as I've seen have free shipping! And that's without Prime.