Searching around I only found reductions, like piano + violin, etc.
I'd like to have the full orchestra version of this score.
Does anyone if I can find it somewhere?
In Madama Butterfly, early in Act I, Pinkerton sings the aria "Duvunque al mondo, io Yankee vagabondo". This aria is preceded by a short introduction by the winds based on the US national anthem "The Star Spangled Banner".
You can also try the Sheet Music Plus site. There are several scores available for sale and I found one orchestral score which is particular inexpensive: