I actually pulled parts off an 05 FX in a junk yard on the East side of Houston. Interior was in decent shape from what I can remember. Can't remember the name of the place - but you should be able to find it if you search for used FX parts around your zip code.
Might be cheaper to have the seat repaired tho - is it leather or mechanical problems?
I hung out with KNFX and he has the ALL black interior - headliner and pillars included. Since I saw that - I want to swap out for the same. Luckily, everything else in my car is already black except for the pillars, headliner & sun shades. Don't see any way to do it cheap tho. Gotta buy the interior pieces new or paint the ones I have, which seems sorta cheap. I know they make paint for interior fabrics...