Use ¾" PVC pipe schedule 40 to make your own flutes. I printed mine on an Ender 3 V2. Slight scaling may be necessary for other printers.
Print with the blow in end upward and the wider pipe insert part on the base plate.
You can print with as little as 20 Percent infill.
Here is a guide to make your own Native American Style flute:
The author marked this model as their own original creation.