I set out to design an organic version of Luna Lovegood's (second) wand to have a custom model to sell in my Etsy shop. I'm releasing it under a non-commercial license for personal use, because I believe in the open source nature of the 3D printing community.
The shape was roughly modeled from reference photographs from the movie prop, and then organic detailing was created by hand to resemble a tulip. Luna's Wand is an organic work, so no attempt was made to make a 1:1 duplicate of the movie prop, but designed to recreate the look and feel of the original.
You can order it printed and finished directly from my Etsy shop (as well as other great Harry Potter inspired wands) at https://www.etsy.com/shop/IamFossCustomPrints
The author hasn't provided the model origin yet.