I watch Aswath Damodaran's videos, Professor of Valuation at NYU. He recently had a video on the data he uses [0]. Might be worth it to email him to see if the data sources he buys matches your needs.

[0] https://youtu.be/M9pFTApeo_8

Additional link to his data site: http://people.stern.nyu.edu/adamodar/New_Home_Page/data.html