If you want the full version and license for commercial use,
you can purchase here :

https://creativemarket.com/kongfont/4500105-Bestbrust-Decorative-Brush-Font

File include : 

1. Bestbrust Ligature.OTF
2. Bestbrust Ligature.TTF
3. Bestbrust.OTF
4. Bestbrust.TTF