Ouch. How about a cheaper solution? That's where the Qinliaf 5-Outlet Extender comes in: Instead of two outlets, you get five, plus four USB ports. And you get that all for $10, down from $12.
Watch this video to see how easy it is to install an outlet extender. They are available in a variety of outlet combinations, including multiple plugs, USB and USB-C ports and even a built-in light.