LoadSharedHODFile? How can I use another subsystems hod?

For new ships models you have:

LoadModel(NewShipType,1);

Using existing ship models:

LoadSharedModel(NewShipType,"Hgn_Shipyard");

What about subsystems? For a new model:

LoadHODFile(NewSubSystemType,1);

What can I use to use another subsystems model/HOD? Does such a thing exist? If not can it be implemented?

I’ve wondered about this years ago (Karos graveyard shows no such function) but with the remastered edition I’m hoping it may have changed.

EDIT:
Just to clarify, I know I can just copy the hod/events files but that’s not very efficient. (Right now I’m, using hardlinks to save space but this won’t work within a .big file.)