Amazon.com: MCE Technologies 250GB Internal Flash SSD Upgrade for MacBook Pro Retina (Mid 2012 - Early 2013) - Includes USB 3.0 Enclosure for Original Drive & Install Kit! : Electronics
MacBook Air 11-inch & 13-inch 2012 SSD - Macfixit Australia
How to make your MacBook Pro faster – upgrading a MacBook Pro mid-2012 to SSD and more RAM memory - Andy the webdeveloper