Though I don't have, nor play, Native American flute, I can understand why Kindness (Lisa) is interested:
This guy has albums of this music, and I enjoy listening to it. Whether I would personally be motivated to put in the time to master it as this many does, I doubt, but I do enjoy and relate to the music itself.
Using google, I see several places to purchase real Native American flutes, but I have no idea which to choose. Hopefully, somebody here will be able to provide informed input.
Here is a site that I quickly found for purchasing a real Native American flute:
https://www.bluebearflutes.com/#!
...and another:
https://highspirits.com/
Here is some info on how to buy one:
http://www.cedarmesa.com/blogfiles/howtobuyanaf.html
https://www.southerncrossflutes.com/...merican-flute/
https://www.crazycrow.com/native-american-flutes
There are plenty more, but I hope these help...
Tony