Logitech Nano USB Receiver Replacement for Wireless Headset Logitech H600 12304060642 | eBay
Amazon.com: Logitech USB Unifying Receiver, 2.4 GHz Wireless Technology, USB Plug Compatible with all Logitech Unifying Devices like Wireless Mouse and Keyboard, PC / Mac / Laptop - Black : Electronics
Logitech MX 5500 Wireless Keyboard Replacement USB Bluetooth Receiver Dongle | eBay
SOLVED: USB for wireless Logitech keyboard lost. - Logitech Harmony Smart Keyboard - iFixit