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

https://fontkong.com/product/retrow-mentho/

File include : 

1. Retrow Mentho.otf
2. Retrow Mentho.ttf
3. Retrow Mentho.woff
4. Retrow Mentho Italic.otf
5. Retrow Mentho Italic.ttf
6. Retrow Mentho Italic.woff