Your search for "CAB-3KX-AC" revealed the following:
Cisco CAB-3KX-AC Catalyst 3750X Series Notched Switch Power Cord
SKU: NSH-1469
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
NEW Cisco CAB-3KX-AC Catalyst 3750X Series Notched Switch Power Cord
SKU: NSN-1251
Condition: New
Shipping: Overnight Options
Warranty: 365 days