Bestbuy offers Apple - 20W USB-C Power Adapter - White for $14.49 (orig. $19) with free shipping.

Product Description:
The Apple 20W USB-C Power Adapter offers fast, efficient charging at home, in the office, or on the go. While the power adapter is compatible with any USB-C-enabled device, Apple recommends pairing it with the 11-inch iPad Pro and 12.9-inch iPad Pro (3rd generation) for optimal charging performance. The Apple 20W USB-C Power Adapter offers fast, efficient charging at home, in the office, or on the go. Pair it with iPhone 8 or later for fast charging–50 percent battery in around 35 minutes.* Or pair it with the iPad Pro and iPad Air for optimal charging performance. Compatible with any USB-C enabled device. *Charging cable sold separately.

• Compatible with most USB-C-enabled devices; from iPhone 8 to iPhone 15; iPad Pto from 1st to 6th Gen; Apple Wacth 9 and previous generations, all Airpods Generations
  For use with your existing devices.
• Optimal charging performance
  While the power adapter is compatible with any USB-C-enabled device, Apple recommends pairing it with the 11-inch iPad Pro and 12.9-inch iPad Pro (3rd generation) for optimal charging performance.
• Reliable charging
  The Apple 20W USB-C Power Adapter offers fast, efficient charging at home, in the office, or on the go. Pair it with iPhone 8 or later for fast charging–50 percent battery in around 35 minutes.¹