Replacing a Logitech K800 Keyboard Key (Type K40) - YouTube
Amazon.com: Viziflex Keyboard Cover Compatible with Logitech K800 Wireless Illuminated, Y-R0011,y-uy95 - Part 597G107 - Keyboard not Included : Electronics
Logitech K740 Illuminated keyboard Replacement keys with hinge | eBay
Viziflex Keyboard Cover Compatible with Logitech K800 Wireless Illuminated, Y-R0011,y-uy95 - Part 597G107 - Keyboard not Included : Electronics - Amazon.com