Available now, Feather - M10 256GB SSD Card for MacBook Air 2010-2011 (A1369/A1370)
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12+6 Pin SSD HDD to SATA Hard Drive Replacement Adapter for Apple 2010 2011 Macbook Air A1369 A1370 12+6 Pin SSD HDD To SATA Hard Drive Adapter Card For Apple 2010 2011
Amazon.com: Sintech 18pin to SATA Adapter with USB SATA Cable for SSD from 2010-2011 MacBook AIR A1369 A1370 A1377 (Not Fit Any SSD from MacBook Air 2012-2017 Year) : Electronics
SSD Upgrade Kits for MacBook Air 2010 - 2011
Teardown Confirms Apple Still Using Modular Solid-State Drive on New MacBook Air - MacRumors