Amazon.com: 3.5" to 5.25" Drive Bay Computer Case Adapter Mounting Bracket, Metal Body, Plastic Bezel for USB Hub/Floppy/Card Reader : Electronics
En-labs 2 X Usb 3.0 Front Panel W/ 3.5" Device/hdd Or 2.5" Ssd/hdd To 5.25 Floppy To Optical Drive Bay Tray Bracket Converter - Docking Stations & Usb Hubs - AliExpress
N-Drive Industrial 5.25″ Emulator Replacement for 5.25″ Floppy Drive | USB floppy emulator Nalbantov N-Drive
Device Side Data - USB Adapter/Controller for 5.25" Floppy Disk Drive Review - YouTube
FSC Frame Adapter 3,5 " 3 1/2in - 5,25 " (5 3/16in) Incl. USB For Floppy Zip | eBay
Floppy drive for both 3.5 and 5.25 - Super User
Floppy disk - Wikipedia
5.25 Inch Cd-rom Drive Bay Front Panel 9pin/19pin 7 Port Usb 2.0/3.0 Hub Floppy Bay Drive Panel Expansion Adapter Connector - Docking Stations & Usb Hubs - AliExpress
3.5" to 5.25" Drive Bay Caddy HDD Tray Adapter Mounting Bracket USB Hub Floppy 6910088870232 | eBay
How come there aren't any 5.25 external USB floppy drives? - Classic Computing Discussion - AtariAge Forums
FlexiDrive USB Adapter | FlexiDrive - Floppy Drive Update
David Hansel's ArduinoFDC Converts an Arduino Into a USB Floppy Drive Controller - Hackster.io
Connection Cable for 3.5" and 5.25" Floppy Disk Drives (FDD cable)