Move calt to salt in mastered files?

Hey everyone.

I have a client that would like to have the contextual alt feature move to the stylistic alt OpenType feature, as the calt is on by default in Adobe apps and they don't want that. 

Is there any simple way of doing this to already mastered files, or am I going to have to go back and remaster them? Maybe a script or tool I can run in Terminal?

Thanks for any suggestions!
Josh