The watch is available still on this site for the time being.
Infinity Watch V2 - Silver Case White Dial Version: http://www.penguinmagic.com/p/S26135
Infinity Watch V2 - Gold Case White Dial Version: http://www.penguinmagic.com/p/S26133
Generally, the best thing to do when a product is "out of stock" is to add the product to your wish list. Penguin will automatically notify you when they get more of the product.