...if you're technically inclined, just buy another retina laptop and swap the screen yourself, and return the brand new laptop with the scratch screen back to them. chances are they will never look at the screen as long as you put everything back neatly the way it is.
Really? I bet when that door catches in the wind and dings the car next to you, you just drive away. Course it sucks when someone does it to you, but hey, (k)Carma is a witch...