It is a VERY long story so I will cut to the chase:

Water damaged iPhone.
Fixed and worked for a week
Yesterday shorted out and now my ribbon cable is destroyed
and (Hopefully not) so is the 8gig Logic board
The ribbon has a black spot on it and it is obvious that it has shorted.

I need some advice about buying a replacement
The number on my cable is MFC DC 4707
The closest match I can find is MFC DC 4702

Does this difference matter?

What is the difference between the two?

I know the screen and other parts are fine. I have checked them over.
I really have fallen in love with this phone and would hate to have to sell it on eBay for parts.
(I am hoping for a cheap fix as I am preparing my wallet for a hit from the Macbook Air)

Any help you guys could give would be great