N7 Warfare Gear was a retail bonus item if you pre-ordered the game from certain retailers. I myself didn’t have this pack, so I can’t track where this files are, but it’s very likely that they are indeed integrated in the main game files, and activated for this specific retailers.
Well, it's definitely not in the DLC folder because I compared your folder names with mine. I think it only checks online for authorization. It failed to do so in my current playthrough, so I just edited my save file to give the items manually. I've read that anyone can do this regardless of whether they have the entitlement, so it's definitely somewhere in the base game files.
