Sadly, this isn't something you can buy. It's a garage kit, which means it's basically a homemade piece, so the astonishing detail you're seeing here is one of a kind. As something so beautiful deserves to be.
It's Ultima, a summons from Final Fantasy XII, and the impressive statue stands an enormous 20 inches tall.
I've included some impressive images of the completed piece, but you can see more — including in-progress shots — at the link below.