It's about time for me to include this concept - It was introduced to the public in late December 2002  but program at Ford was scratched by late winter of 2003 - short time frame for this concept.
It does still exist but only as a one of a kind from Ford and only as a Prototype or Preproduction (test) model.  It's now in the care of a  private collection and does get brought out for special club events on the East Coast. There will be more info coming with photos.  Let's just say for now that it contains an engine and transmission from a Jaguar, and modified to fit and work with the Thunderbird's electronics.