Your search for "PWR-400W-AC" revealed the following:
Cisco PWR-4450-POE-AC ISR 4000 1000W AC Power Supply w/ PoE Module
SKU: NSH-6529
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
NEW Cisco PWR-4430-POE-AC ISR 4000 Series 500W AC w/ PoE Router Power Supply
SKU: NSN-4050
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Arista DCS-7020SR-32C2-F 32x 10GB SFP+ 2x 100GB QSFP F-B Airflow Switch
SKU: NSN-6773
Condition: New
Shipping: Overnight Options
Warranty: 365 days