Newegg currently has the ZyXEL PLA407 Powerline Adapters on sale for $19.99
each or you can get a pair for $39.98 with promo code ZYXLFEB21. The promo
code expires on 2/17. Has great reviews on Amazon.
Amazon link for reference: http://www.amazon.com/ZyXEL-HomePlug-Powerline-Wall-Plug-Adapte