ORICO 3.5 inch 5.25 Bay Stainless Internal Hard Drive Mounting Bracket Adapter
Amazon.com: StarTech.com 5.25" to 3.5" Trayless Hard Drive Hot Swap Bay - Removable Hard Drive Bay for 3.5" SATA/SAS Drives - Aluminum (HSB1SATSASBA) : Electronics
Drive bay - Wikipedia
3.5 inch SATA rack for 5.25 Bay internal hard drive mounting Bracket Adapter - black - Orico
Bytecc Bracket-25525 5.25" HDD Mounting Bracket for 2x2.5" or 1x3.5" H — EIO.com
97532-60051 HP 103MB 5.25-inch Internal Hard Drive
SilenX 5.25" Luxurae Hard Drive Cooler and Silencing Solution LX-HDSS
Seagate: 5.25-inch hard disk drives could return to datacentres | KitGuru
StarTech.com 5.25" to 3.5" Hard Drive Hot Swap Bay for 3.5" SATA (HSB1SATSASBA)