If you take the LCD out of the housing, you might get an inch or two more of cable. Usually that flat ribbon cable connects further up on the back of the LCD. Of course, I don't know how much more cable you need, so this might not help much.
As for extensions, I've never heard of one...but that doesn't mean it doesn't exist.
You could always do what I"m currently doing with my laptop and take the LCD out of the housing, then flip the screen around so it looks almost like one of those tablet laptops (but it doesn't close all the way).