In my garage, I have the original black rear bumper cover off my 2000 GT.
It is in good shape, except for a scrape on one corner, and a slight indentation in the middle from the license plate holder of a Taurus.
Make offer if it'd be useful to you.
When the shop replaced mine, they ordered and painted it while I kept the car. When I went in to have it put on, the said their paint didn't match the Black Granite Pearl on the rest of the car. I couldn't see a difference, but they insisted that they should repaint the bumper. They took my gas filler door, and used that as a sample to match the paint. Two days later I went back and they were happy with the match, and put the new piece on.
Find a shop who cares about the quality of their work.