Apple MacBook Pro 13" (Mid 2014) - Core i5 2.8GHz, 8GB RAM, 512GB SSD (Renewed): Amazon.co.uk: Computers & Accessories
MacBook Pro 13" and 15" Retina (Late 2013-Mid 2014) SSD - iFixit
SSD speeds on mid 2014 rmbp? | MacRumors Forums
Amazon.com: Apple MacBook Pro MGX72LL/A 13.3inch with Retina Display I5 4278u 2.6ghz 8GB, 128GB SSD (Renewed): Computers & Accessories
Amazon.com: PCIe SSD to M.2 NGFF M Key Adapter Card for 2013 2014 2015 2016 MacBook Air Pro Retina, Hard Drive Converter to Ngff M2, Support Model A1465 A1466 A1398 A1502: Computers & Accessories