It is out of stock, the NP website is correct. NOt sure why the AM store lists it as in stock, but once you add it to your cart it shows OOS. I'll forward this to our webmaster. Thanks for keeping an eye out.
Our store neither lists it as in stock or out of stock - you don't know what the stock status is until you click Add to Cart. At that time, the cart does indeed list it as OOS and won't allow you to check out with it in your basket.