Well, I'll go with 1.
The one at Planes of Fame is a glider (HO IV).
There is an airframe at National Air and Space, but all the pics show it without wings.
So, that leaves the full size replica that Northrop built to test if it was the first stealth fighter. Which they found that if it was coming in on the deck that the British Chain Home radar would have missed it.
Has "Hitler's Stealth Fighter" aired on Nat Geo yet?
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