AnkerDirect via Amazon has 30W Anker USB-C Car Charger w/ 2 Ports (USB-C + USB-A) for $7.97. Shipping is free with Prime or on $35+ orders.

AnkerDirect via Walmart has 30W Anker USB-C Car Charger w/ 2 Ports (USB-C + USB-A) for $7.97. Shipping is free w/ Walmart+ (free 30-day trial) or on orders of $35+.

Thanks to Deal Hunter doublehelixx for finding this deal.