ZyXEL PLA407 Powerline Pass-Thru Ethernet Adapter Kit (Pair) for $54.99 shipped. Here is a screenshot for your reference. It features a plug-and-play design, data transfer rate up to 200Mbps, built-in noise filter, multi-color status LED, and more. Alternatively, it is available at Amazon for $54.99 shipped. Most places have it for about $100.