Amazon.com: 3.5" to 5.25" Bay Hard Disk Drive HDD Mounting Bracket Adapter Metal Kit : Electronics
Amazon.com: PASOW 2.5'' or 3.5'' to 5.25'' SSD HDD Mounting Bracket Internal Hard Disk Drive Bays Holder Adapter for PC : Electronics
Amazon.com: 2pcs 2.5" to 3.5" Hard Drive Tray Holder for PCI SSD HDD Metal Mounting Bracket Adapter for PC Case Bottom Without Motherboard : Electronics