I don't know of a script that will do exactly what you are asking for, but I do know of a script that may help "SpawnCharacterP6 update" by svdl.

What the script does is to create a new INJ morph that is a consolidation of all the morphs expressed in the figure. The new morph has an FBM dial in the BODY, it does not need any other morphs or morph packs to be injected into the figure, as the deltas are contained in the INJ pz2. It's a quick and easy way to apply a full body (or partial) character morph to your figure. It also has the advantage of saving resources, as only one morph needs to be injected into the figure. As the pz2 produced contains deltas, it can't be redistributed if any of the morphs used were copyrighted.

One limitation of the script is that the figure needs to contain DAZ style PBMCC channels, but the morphs that are being consolidated can have unique none PBMCC names. If your figure does not contain PBMCC channels you can add them. If you need help on how to do that, ask me.