A gear to cover another gear.

[The Legendary Joe]

I think the closest thing you'll get to this is the Gemmed Sallet which has always had a lack of a sprite, and appeared like you were naked. but that's for upper headgear. Otherwise, there is Nobility gem like Hiro said.

It sucks, but sometimes you have to pick and choose. Fashion, or Functionality. There isn't really a compromise unless you have 25 m or a buncha gold stashed away.