Can't make it to London, where Kate Middleton engagement dress knockoffs are lining the streets (or so we imagine it to be that way)? Issa's original long-sleeved silk-jersey dress , yes, the very version Kate first paired with Princess Diana's sapphire ring has hit NET-A-PORTER.

The first shipment of the $535 frocks sold out within hours of the official announcement of her royal engagement, but the site expects to receive more dresses in January. In the meantime, customers can add the dress to their "Wish Lists," so they'll be ready to make their purchases as soon as it becomes available.

Unfortunately, NET-A-PORTER wasn't able to tell The Huffington Post how many more dresses the site is expecting...which means if you want a piece of the Kate Middleton style pie, you'll just have to keep watching the site and practicing your clicking skills.