As promised, the reply we received from LEGO is below. If your mouse has run out of clicks the short answer is: we can't tell you until we tell you. The long answer awaits your viewing.
On the other side of the coin is the LEGO fan community, who held a long and vociferous debate over the authenticity of this piece. The main argument circled around the oddity of the dome until it was pointed out that 10215 Obi-Wan's Jedi Starfighter
has a red R2 unit that uses the same dome.
One talented member of the LEGO Star Wars and Minifigures Collectors Group
on Facebook, Daniel German Jarvis, decided to demonstrate the adaptability of LEGO bricks by MOCing a similar version of Obi-Wan's astromech R4-P17 to show that this latest polybag is likely genuine.
Despite LEGO making it clear that they can neither confirm nor deny the existence or validity of the set, there are instructions on the LEGO server and are available for direct download. Hit the banner below to open them up.
We are also hosting a copy
of the instructions in case LEGO decides to remove them.