Your search for "c3kx-pwr-440wdc" revealed the following:
Cisco C3KX-PWR-440WDC Catalyst 3750X 440W DC Switch Power Supply
SKU: NSB-3548
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
$ 337.99
• Only 2 remaining
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NEW Cisco C3KX-PWR-440WDC Catalyst 3750X 440W DC Switch Power Supply
SKU: NSN-5623
Condition: New
Shipping: Overnight Options
Warranty: 365 days