Amazon.com: TP-Link Powerline WiFi Extender - Add-on Single Adapter, Ethernet over Powerline, Plug & Play, Compatible with all TP-Link powerline adapters with different speed, AV600 with N300 WiFi(TL-WPA4220) : Everything Else
Zyxel PLA5236KIT AC900 Powerline Wireless Extender kit review: A cheap alternative to Wi-Fi systems - CNET