leobatisti, that number is not for a cable, but for the LCD. Since the LCd and the digitizer are fused by Apple (Digitizer part: 821-1174-A LCD part: 821-1125-A) you need to purchase it as a compete assembly. Use this guide to replace your front panel assembly. "The front panel is not separable from the LCD. A new front panel assembly will give you a new front glass panel, digitizer, and LCD." the part is available right here as well as many other places. Hope this helps, good luck.
A brand-new replacement screen and digitizer, hand inspected by an iFixit tech. The LCD and front panel glass are fused together and must be replaced as a single part to fix a broken screen. Includes display assembly and adhesive strips necessary for inst — 25 available at 34.95 each.