This article explains where to find and acquire an AC power cable that goes to the power brick on an X-Series unit

The AC power cable that connects to the Power Adapter on Elo's X-Series, I-Series,  E-Series, EloPOS, EloPOS Pack is a 6-foot, IEC C5 Cable. These are sometimes referred to as a "Mickey Mouse" or "3-lobe" style cable. 
The Elo part number for ordering a replacement IEC C5 AC cable is:E604766. The description is: CAB-PWR-US-3 LOBE-1.8M-BLK-R



These are widely available at most electronic stores or online vendors such as Amazon or Walmart .