RPG Maker MV: Modifying Generator Parts to Create TVD Parts

I apologize if this topic has already been covered and/or if I sound like an idiot, but I was hoping for some help/guidance on the issue indicated by the title.

I recently downloaded some generator resources from these forums, specifically the RPG Maker MV Helmets from this thread: https://forums.rpgmakerweb.com/index.php?threads/astaltw-mv-ressources.84176/

While Astaltw provided the parts for Variation, SV and TV in the Generator for the helmet resources I downloaded, he did not have TVD parts for them and I would prefer not to impose additional work on Astaltw unless I do not think I can do it on my own.

Since the sprites for TV and TVD Part are very similar, is it possible to modify the TV parts (specifically the top row facing downward) to create corresponding TVD parts? If so, how could I do so?