Amazon.com: 256GB SSD Hard Drive for Apple MacBook Pro Air 11" 13" 15" A1502 A1398 A1465 A1466 (Late 2013-2015) / OSX Sierra/Mac Pro A1481 : Electronics
Restored Apple Macbook Pro 15.4-inch Laptop (Retina IG) 2.2Ghz Quad Core i7 (Mid 2014) MGXA2LL/A 256 GB SSD 16 GB Memory 2880x1800 Display macOS Sierra Power Adapter (Refurbished) - Walmart.com
Amazon.com: Mid-2014 Apple MacBook Pro with 2.5GHz Intel Core i7 (15-inch, 16GB RAM, 512GB SSD Storage) (Renewed) : Electronics
Upgrading 2013/2014 Macbook Pro SSD to M.2 NVMe | MacRumors Forums