EXPIRED 4 Port USB Electric Charger Dock Station US$3.90 | AliExpress
Thanks to dualmeister at MyBroadband for this one. New DC 4 Ports USB 5V 3.1A Electric Wall Charger Dock Station Socket Power Outlet Panel Plate Switch Power Supply Adapter Plug going for US$ 3.90 each if you buy 3 or more. Free shipping if you're willing to wait.
Model Number:Sharing Switch
Model:USB switch socket