2.5'' HDD SATA SATAII SDD 2nd 12.7mm 9.5mm SSD HD SATA Hard Disk Drive HDD Caddy Adapter Bay for iMac for Macbook|Computer Cables & Connectors| - AliExpress
HOW TO] iMac 27" (mid 2011) two SSDs in RAID 0 config + HDD | MacRumors Forums
OWC Internal SSD DIY Kit for Apple iMac 21.5" OWCDIDIM21SSD11
Apple SATA SSD/Hard Drive Combo Cable for iMac 27-inch A1419 – Orange Direct (NZ)