This is the Hard Suit lego Exia Mass Production. This is just the torso and prototype head at the moment. I know this is not the head for the Exia but it is very hard to build one at such a small scale.

This is the closest i've ever gotten to building a lego version of the Exia. The pilot minifig us inside the torso at the moment. The cockpit even has a screen. Also The torso can open up to let out the pilot.