Amazon.com: Wall Charger Power Adapter for Google Chromecast Audio RUX-J42 : Electronics
How to use Chromecast to stream music to dumb speakers (as Chromecast Audio does)? - All About Chromecast
HQRP AC Adapter / Battery Charger / micro USB Charging Cable for Google Chromecast (2013) / Chromecast 2 (2015) Chromecast Audio HDMI Streaming Media Player Model H2G2-42 MST3K-US + Euro Plug Adapter | Walmart Canada
Power Supply Adapter + USB M Cable For Chromecast Audio Ultra + 1st 2nd 3rd GEN | eBay