I bought my set through NPD. However, they only have the panels and some of the attaching hardware (pull cups, screws and clips). As I was converting from standard door panels, I was basically starting from scratch and had to run down the courtesy lights, chrome trim, woodgrain inserts and poney emblem (which I got from various eBayers and other Mustang sites).
If your deluxe door accessories are still in good shape, the panels that NPD sells are very nice and fit great. I have a vermillion interior, so I bought the white set and painted/dyed them to match.
Good luck!