PlasticSCM already provides some FMOD Studio scripts that allow you to use PlasticSCM with FMOD Studio. The Plastic team developed and maintain them so I don’t know what state they’re in atm.
We don’t have any plans in the near future to support more source control providers but we’ve noted your interest and may support more further down the track.
We have some scripts for FMOD Studio that allow you to use Unity VCS/PlasticSCM as a source control provider. We’ll probably include them in the FMOD Studio 2.02.23 release.