I really wouldn't worry about it. You most likely won't get an official response neither, given the sort of abusive behavior your peers like to portray when given an inch. Creating something out of pure self-serving fandom is not much of a problem. It's when you distribute, and especially sell, the item in question that it becomes a legal issue. Even then though, small-time produced clothing is hardly a concern of theirs. If distribution is not your game, go for it. If they were that concerned about it, you'd never see anyone cosplay an FF character, bake cakes/cookies with FF symbolism, create fan sites, etc.