Best Buy: ScreenBeam MoCA 2.5 Network Adapter for Ethernet Over Coax (2 Pack) 2.5 GBPS Coax to 1.0 GBPS Ethernet Adapter Black ECB6250KIT01
Ethernet-over-Coax Adapter Kit – Dualcomm
LINOVISION Ethernet Over Coax Converter(EOC) POE IP Over Coax Extender , Max 3000ft Power and Data Transmission Over Regular RG59 Coaxial Cable | LINOVISION US Store
Amazon.com: Motorola MOCA Adapter for Ethernet Over Coax, 1,000 Mbps Bonded 2.0 MoCA (Model MM1000) : Electronics
What is Ethernet over Coax, and how does it make your WiFi better? - Quora