This place has all you need for internal and external cables/connectors. I just had to replace the large 60 pin ribbon cable that comes off the second card and goes to the control panel on my EIII kb.
Where the cable attaches to the display board is scary. It has no connector to speak of, but actually has contacts that you have to punch through the new ribbon cable. I will post pix of this shortly, but it is a delicate operation to say the least.
http://www.pacificcable.com/InternalRibbonCables.htm 
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