Can you buy a replacement rear windscreen for a hatchback, would autoglass etc be able to replace one? Only reason i ask is somebody has completly butchered the elements on my rear window demister, and the bottom 7 dont work as there are about 6" chuncks missing out of the elements, it would be too big a job to try and repair them so it looks like the only way is to have a replacement window fitted, any ideas how much it would cost?