Change keys on Macbook Pro Early 2011?

Hi, I have a Macbook Pro Early 2011. The problem is that I have bought this laptop in Italy so it has the italian keyboard, so I would like to change the keys to have the backlit use keyboard. I saw that http://www.thebookyard.com/apple_keycaps.php?cPath=66_117 sells keys for the macbook, easy to substitute. How can I know what kind of cap keys is in my macbook?