Well, aside from calling Sony up and asking(which isn't a bad idea) your local Glassier(I think that's what it's called, the glass maker) can probably make you a replacement piece.
I'm guessing you still have the hinge mounts and whatnot from the shattered one, and also the other glass door?(it sounds like there's two glass doors from the way you said one of the doors) From that I believe an intelligent glassier should be able to make a mirror image of the one that still exists, and then just mount the leftover pieces from the original glass door.
And of course your friend will be paying the bill.