Just spoke to a TW rep on the phone and she said they were out of stock, but were expecting another shipment in the near future. They don't have a firm date yet, so they simply ghosted the product instead of putting a fake date on the page.
Seems a little odd, but she sounded like it was no big deal. Plus, she asked other folks there to make sure she had her story straight, so I'm inclined to believe her.
Anyways, she said they were a pretty hot selling item, so I doubt they just stopped carrying it. Seems to be a bit of a mixup or a supplier issue, but only temporarily.