In order to obtain this data, I would contact the authors of one of the more recent papers (Masulis et al 2011, for example) or the IRRC at http://irrcinstitute.org/contact/. It seems as though other authors contacted Gompers et al (2003) for the IRRC data, so that could also be a lead.
The TCL benchmark score and the BC Govscore only seem to be used in one of the major papers about corporate governance. If you want to use the TCL benchmark score, you need a subscription to the database through a company called MSCI, which you can contact at https://www.msci.com/contact-us. The BC Govscore comes from the Institutional Shareholder Services (ISS), and you can find the specific database at https://www.issgovernance.com/solutions/iss-analytics/quickscore/.
The BC Govscore comes from the Institutional Shareholder Services (ISS), and you can find the specific database at https://www.issgovernance.com/solutions/iss-analytics/quickscore/.
Papers on the subject, even recent ones, indicate that the corporate governance data doesn't go past 2003. It is possible that some of these databases could have more recent data, although I couldn't say if that is the case because I don't have access to the databases.
=Papers=