Yamaha WX5 wind midi controller is recommended to put into
Yamaha VL70m, which produces this kind of flute sound. I don't have samples, but you can try to search (google etc.) for samples of Yamaha VL70m.
If I could produce it by VST synths or sound modules I would do this for you without the problem. The only similar sound I did is the pad:
http://www.arsen.civ.pl/aeropad3.mp3
Regards,
Mike