It's now up for preorder, but there's no mention of the helmet being included, just the lightsaber being removable.
"An Entertainment Earth Exclusive! Gentle Giant Star Wars Exclusive Darth Vader Anakin Reveal Mini Bust. Limited to 5 per person.
Standing nearly 6-inches tall, this replica is an authentic recreation of Darth Vader and his scarred, battered face as seen in Revenge of the Sith. Based on on-set 3D scanning and the talents of Gentle Giant Studio's artisans, you can see, for the first time ever, this collectible recreation of the scarred remains of Anakin Skywalker inside the suit of Darth Vader. Limited edition of only 5,000 pieces, this item is exclusive to Entertainment Earth and packaged in an attractive 4-color window package.
As an added bonus, the blade of the lightsaber is removable, so it's up to you if you want to display him with his lightsaber ignited, or turned off so you can get a better view at the scarred remains of Anakin Skywalker!
Wholesale pricing through EE Distribution is not available."