I am not sure if they sell that whole peice but if so then you may have to do quite a bit of cutting and welding. They would be called left and right rear panels. Look on www.classicchevy.com I think that's the site but I got it from someone off of here. Just got to look around. I spend about 6 hours looking for glass for a 57 and still only found the front and side glass, so it may take a long time. Either that or go look for another 55 that is cheaper and doesn't need as much done to it.