MorphManager seems to do the trick.
However I cannot find an option to mass-copy all morphs in all actors matching a given name? Is there a trick to do that maybe?

Can CR2Builder do this, do you know hatch?

It is not copying the ERC, but copies the slaving of the morph targets, so all one has to do is to create a new valueParam on the BODY actor and then the whole FBM works, that is nice.