Hi i have a VR calais that had an unfortunate incident with a spruce pine,went through the rear windscreen end result is i need to replace the rear windscreen, i was told that a VN fitted so i got hold of one and it didn't, it was an inch too tall i then was told that a VS would fit but it didnt it was again an inch too tall, my friend measured his VR calais and came up with 30inch's top to bottom at the centre and 27inch's at the side, the windscreen i have is suposed to be out of a VS commodore and its 31inch's top to bottom at the centre and 28 inch's at the side and it will not sit in the gutter, so can someone give me some advice that is correct please.