Ebay offers Monster 150W Power Inverter USB-C Delivery AC Outlet Cars for $18.99 (reg. $41.99) free shipping with Amazon Prime. 

Product Description:
When you're on the road, staying connected and powered up is essential. The Monster 150W Power Inverter can be a game-changer for those who need to keep their devices charged while driving. Whether it's for navigation, communication, or entertainment, having the ability to plug in your smartphone, tablet, or laptop into your car’s power source means you’re always ready to go. With 150 W AC outlet and 2 USB Port with Power Delivery, you can ensure that both your personal and work devices are fully charged, making long drives more productive and enjoyable.