Amazon.com: PCIe NVMe Gen3x4 SSD 1TB 512GB 256GB 128GB 3D TLC NAND Flash Hard Drive SSD Replacement for Macbook Air 2013-2017, Macbook Pro Retina 2013-2015, iMac 2013-2017, Mac Pro 2013, Mac Mini 2014 (1TB) : Electronics
Amazon.com: Sinobright Original 128GB PCI-e SSD Replacement for MacBook Pro Late 2013 - Mid 2014, MacBook Air Mid 2013 - Early 2014, iMac Late 2013 - Mid 2015, Mac Mini Late 2014 (Bulk, No Retail Packaging) : Electronics
SSD speeds on mid 2014 rmbp? | MacRumors Forums
Apple MacBook Pro Retina 15" (256GB SSD, Intel Core i7 4th Gen., 2.20 GHz, 16GB) Laptop - Silver - MGXA2LL/A (Mid 2014) for sale online | eBay
Amazon.com: Odyson - 128GB SSD Replacement for MacBook Pro 13" Retina A1502, 15" A1398 (Late 2013, Mid 2014) : Electronics
hardware - MacBook Pro, Mid-2014, SSD replacement - Ask Different
Amazon.com: Reletech 512GB SSD NVMe M.2 Gen 3x4 Upgrade Solid State Drive for MacBook Air(Mid 2013-2017) MacBook Pro (Retina, Late 2013 - Mid 2015) Mac Pro(2013)&Mini (2014),iMac(2013-2017) (P400M, 512GB) : Electronics