Welcome to the Forums and the world of '64 Airstream ownership!
My '64 Overlander should be quite similar to your '64 Ambassador. If you need photos of the front lounge, I could take several views before this weekend rolls around. If you need photos of the center twin beds, I can also provide photos of those, but from your description it sounds like you have the center double arrangement which would be quite different from my center twin.
Good luck with your Ambassador!
Kevin D. Allen
WBCCI (Lifetime Member)/VAC/Free Wheelers #6359
1964 Overlander International/1999 GMC K2500 Suburban (7400 VORTEC/4.11 Differentials)
1978 Argosy Minuet 6.0 Metre/1975 Cadillac Eldorado Convertible (8.2 Liter V8/2.70 Final Drive)