HSB2535SATBK Dual Bay 5.25" Trayless Hot Swap Mobile Rack Backplane | AVADirect
Akasa AK-HDA-05 5.25" HDD caddy | Conrad.com
Hitachi Dk511-5 5.25" 40mb MFM HDD 5445803b Untested Hard Disk Drive Full Height for sale online | eBay
5.25'' Hard Drive to 3.5 inch Front Bay Mounting Bracket Adapter Laptop | eBay
Amazon.com: StarTech.com 5.25in Trayless Hot Swap Mobile Rack for 3.5in Hard Drive - Internal SATA Backplane Enclosure - Lockable drive bay (HSB100SATBK) Black : Electronics
Seagate: 5.25-inch hard disk drives could return to datacentres | KitGuru