Woot offers All Aport Multi-Port Car Charger for $16.99 (orig. $69). Free shipping for Prime Members.

Product Description:
The All-Aport Multi Port Car Charger is a multi-functional power charger that supports simultaneous charging of multiple devices.
It’s an extended charging hub with a 65W power output, which allows you to charge two items simultaneously at their fastest speed possible. The external design makes it easy to carry around and use in your car .Never be without a car charger again for everyone aboard your vehicle.
Features:

• Simultaneous charge of multiple devices
• 65 .5W Power output
• Convenient and flexible
• Compatible with MOST cars