Amazon.com: GODSHARK mSATA to A1398 A1425 (2012 & Early 2013) Adapter for MacBook Pro Retina SSD Replacement, Mini PCIe SATA SSD Converter Card : Electronics
256GB SSD for Mid 2012 Early 2013 Apple MacBook Pro 13" 15" Ret. A1425 A1398 | eBay
How-To: Upgrade the SSD in your MacBook Air or Retina MacBook Pro, boosting size & speed - 9to5Mac
Macbook Pro Mid 2012 SSD Upgrade - YouTube
How to Upgrade & Replace an SSD in MacBook Air | OSXDaily