Seeking AMG artwork origin and original

[David75]

Hi,
There's a pic/artwork from AMG I particularly like, it's the one from which I made my avatar.

You can see it with a better size here:
http://www.animegalleries.net/img/502

Does anyone know where it comes from? Artbook, poster, other?

I'd be very pleased to know and would try to get the original if avalaible somewhere.

Thanks a lot.

Moved to Fanart.