In the process of identifying the indicators for the FAIR maturity model we used a Github repository.
That repository is currently dormant as the indicators and their weight has been agreed for initial version of the FAIR maturity model. We have now moved the repository to a more stable place. It is now under the Research Data Alliance Github account. In case you are looking for the repository you can now find it at: https://github.com/rd-alliance/FAIR-data-maturity-model-WG/