Your search for "C6840-X-1100W" revealed the following:
Cisco C6840-X-1100W-AC Catalyst 6800X Series 1100W AC Switch Power Supply
SKU: NSH-8669
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
$ 239.99
• Only 2 remaining
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NEW Cisco C6840-X-1100W-AC Catalyst 6800X Series 1100W AC Switch Power Supply
SKU: NSN-2611
Condition: New
Shipping: Overnight Options
Warranty: 365 days