unless you get a double din you will need a dashkit and wiring harness kit total of about $30 totally worth it though.
nope. you get them custom. search lambo door kit
You can check on eBay.
a cougar
Yes.
Buy a flush kit at auto parts store and follow instructions
Have you tried all the scrap/wreckers out. Hard to find.
get a hinge replacement kit for that door. its the door sagging NT the latch.
I heard there was an internal filter. I got a trany kit with filter and took the pan off but there was no filter there, just the valve bodies.
some models have a built in amp under the dash on the passenger side i bypassed it with a wiring kit from crutchfield
You didn't explain much of what was wrong, but with my cougar I thought it was the latch, but it was actually having to replace the bushings in the door hinge. It used to be that you could just by the bushings kit, but now you have to by the whole set up.
The best way is to go to a junk yard and pull the disk brake assembly off of a Cougar, or a Contour/Mystique, the latter two will require you still purchase a Cougar specific E-Brake cable though. There's plenty of info on this conversion in the wheels, tires, and brakes section at the newcougar.org forums.