MacBook Pro 13" Retina Display Late 2012 SSD Replacement - iFixit Repair Guide
Amazon.com: Odyson - 768GB SSD Replacement for Apple MacBook Pro 13" A1425 & 15" A1398 (2012, Early 2013) : Electronics
Amazon.com: MCE Technologies 1TB Internal SSD Flash Upgrade for MacBook Pro Retina (Mid 2012 - Early 2013) - Includes USB 3.0 Enclosure for Original Drive & Install Kit! : Electronics
MacBook Pro (Retina, 15-inch, Mid 2012) SSD Upgrade - A Leslie Wong Blog
MacBook Pro 15" Retina (Mid 2012-Early 2013) SSD
Amazon.com: Odyson - 128GB SSD Replacement for Apple MacBook Pro 13" A1425 / 15" A1398 (Late 2012-Early 2013) : Electronics
Amazon.com: MCE Technologies 2TB Internal SSD Flash Upgrade for 13" and 15" MacBook Pro Retina (Mid 2012 - Early 2013) - Includes Installation Kit! : Electronics
Macbook Pro Retina 2012 Wi-Fi Upgrade - A Leslie Wong Blog
Amazon.com: Transcend 240GB JetDrive 725 SATAIII 6Gb/s Solid State Drive Update Kit for MacBook Pro 15" with Retina Display, Mid 2012 - Early 2013 (TS240GJDM725) : Electronics
NEW Apple SSD Upgrade 1TB For MacBook Pro Retina 13" 15" 2012 2013 A1425 A1398 | eBay
How to Upgrade a Mid 2012 15" MacBook Pro - New RAM - New SSD! - YouTube