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