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
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Apple MacBook Pro Retina 512GB Solid State Drive – 13″ A1425 (Late 2012, Early 2013) / 15″ A1398 (Mid 2012, Early 2013) 661-6487, 661-7010, 661-7286 | MacBlowouts
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128GB SSD For MacBook Pro 15” Retina A1398 Mid 2012 Early 2013 EMC2512 EMC2673 | eBay