Bestbuy offers Aluratek - Wireless Adapter for Apple CarPlay - White for $69.99 (orig. $89.99) with free shipping.

Product Description:
Aluratek’s wireless car adapter for CarPlay provides instant Apple CarPlay capability without needing to connect your phone’s cable to the vehicle’s CarPlay enabled USB port. You can easily enjoy music, navigation, Siri, and many more CarPlay features without needing to connect your cable.

• Easy setup/Plug & Play
  Plug & Play, no need to download any apps, you can enjoy wireless CarPlay easily and effortlessly. Plug it in then forget about it as it self-powers from your vehicles USB port.
• Auto reconnect
  The adapter also supports auto-connection. Once you've paired your device, the adapter will automatically activate the wireless CarPlay connection every time you start your car, eliminating the need for connecting cables.
• Pair multiple devices
  Pair up to 5 devices. Great for vehicles with multiple drivers or passengers. Only 1 device can be actively connected to your CarPlay.