Here's a pretty nice flute RT for Bossa Nova: RealTracks in song: 704:Flute, Soloist Bossa Ev 140
Here's a song in which we used that track (my wife on vocals): https://soundcloud.com/alananddi/dance-of-love-remix
But I agree, a few more would nice - especially for slower Bossa Songs. And yes, a Jethro Tull flavored track would be nice, too.
And some Latin Jazz styles similar to Dave Valentin - like this: https://www.youtube.com/watch?v=g6WvDMI6axc