Best Buy: Logitech Harmony Precision 6' IR Cable (2-Pack) Black 993-001218
Amazon.com: in Wall IR Infrared Remote Control Extender Repeater Allows You to Control Devices Room to Room with This Easy to Install IR Repeater Extender : Electronics
Infrared (IR) Remote Control Repeater Kit (TAA Compliant) | Remote Control Extenders | AV Control Devices | Audio Video
Amazon.com: Logitech Harmony IR Extender System - Black (Discontinued by Manufacturer) : Electronics
Logitech harmony precision ir cables
Best Buy: Logitech RF Wireless Extender 966195-0403
Amazon.com: Harmony IR Adapters, Ancable 2-Pack 2.5mm Mono Plug to 3.5mm Mono Jack Connector for Logitech Harmony Hub and IR Blaster, IR Emitter Extenders, IR Repeaters, IR Receivers : Electronics
Logitech Harmony IR Extender System - Black (Discontinued by Manufacturer) Audio/Video Splitters - Newegg.com
Logitech Harmony Home Hub Extender review: Control locks, bulbs and more with a new extender for Logitech's Harmony Home Hub - CNET
Logitech Harmony C-RE4A RF Wireless IR Range Extender 815-000013 . | eBay
Amazon.com: 2-Pack Infrared IR Mini Blaster (Emitter) Extender for Logitech Harmony Smart Control Remote, Add or Replace an IR Mini Blaster : Electronics
Logitech® Harmony® 900 Universal learning remote with web-based setup at Crutchfield
20-60khz Ir Repeater Kit Ir Extender Infrared Ir Remote Control Extender Emitter Receiver Transmitter Remote Start Kit Amplifies - Remote Control - AliExpress
BAFX Products (Infrared) IR Remote Control Extender or IR Repeater Kit - Control 1 to 8 Devices (Ex - Miscellaneous | Facebook Marketplace | Facebook
Logitech Harmony Home Hub Extender 915-000253 - Black