This story is probably a mis-reporting of the finding of the FW-190D13 that eventually ended up in the Champlin Fighter Museum in Mesa, AZ. In the 70's (I believe) it was actually sent to Germany for initial restoration where Kurt Tank was personally invloved. I visited this plane many times when I was in Phoenix on business. When the museum was closed, most of the collection was sold to the Museum of Flight in Seattle. I've not been to Seattle since, but hope to visit it one day.
Before the Dora went North, it was restored (again) by Gosshawk Unlimited, where the wings that had been mounted on this plane were swapped with the wings on the D9 from the NMUSAF in Dayton (the wings differ in small details such as the D13 has a cannon eject port that the D9 did not have, etc.). The 2 planes had been at the same event sometime in the 60's and the wings were carelessly shipped back with the incorrect planes by mistake and the problem was never corrected. I'll bet it took a LOT of paperwork to convince the Museum to send the wings (or maybe the whole plane?) to Gosshawk so they could both be restored to their proper planes.
Speaking of Doras, does anyone know the status of the D9 that Collings bought and is supposedly restoring?