Cable Leader 6ft 14AWG Computer Power Cord, NEMA 5-15P to IEC C13 AC Power Cable, Heavy Duty 3-Prong Replacement Power Cord for PC, Monitor, Printer, Server & TV - Black

Ideally, look for one with the same 13 amp rating as the one in the photo seller sent you. A good rule of thumb is to not exceed 80% of something's rated capacity in power or current when using it at a typical load. The PSU isn't drawing 1050w all the time, so a basic 10 amp cable should be fine, but there's no harm in getting a heavier 14awg cable rated for 13 or 15 amps. Something like this will work just fine.