Logitech Harmony IR Blaster (IL/RT6-14294-815-000071-MP-UG) 97855036919 | eBay
Extension cable/cord 4 Logitech Mini IR Blaster,harmony 900RF extender,Google TV 708981172869 | eBay
Logitech IR Extender System
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
Amazon.com: IR Repeater USB IR Extender Infrared Remote Control Transmitter External Universal Hidden IR Emitter for 38-56kHz Cable Box, Set-top Box, DVR/STB, Roger, Cabletica, Comcast, Spectrum, Xfinity (1 PC) : Electronics
Amazon.com: 2-Pack Infrared IR Mini Blaster (Emitter) Extender for Logitech Harmony Smart Control Remote, Add or Replace an IR Mini Blaster : Electronics