Good stuff Ralph..
What all is involved in doing that?
One hole, drilled with the included hole saw, in the bottom of the door.
Since I had the courtesy lights, I could expose some wire going to said courtesy light, solder the wire from the ghost light to the courtesy light wiring, and used Scotch brand electrical tape to reseal. (Better would have been to use heat shrink, but I was lazy.)
I carefully ran the wiring, and adjusted for location, before I drilled the hole. Even so, the window barely touches the barrel inside the door; not enough to cause problems, but if I had moved 1/16" closer to the inside, the NUT would not have fit, so it's just about perfect in/out.
I lined it up with the hole that the wiring went through the inner door for a location; that fit and worked for me.
I've not found any internal mount ones for a T-Bird yet; but the Cougar ones seem to work great.
One side note: As I open the door, I still reach down "to grab that piece of paper that blew out on me" *grins*