1987 4000S 5Cyl.

Hey everyone, i have a 4000S and i've had it for awhile and done some changes to it and also fixed a few things, recently some vandal decided to smash out my back window. So now my Audi is sitting in the yard and i dont think i'm going to get it back on the road until i do a complete rebuild on it, starting with the body which has a bit of rust and a few small bullet holes (not from bullets) Anyone have any color suggestions, dont want to go out rageous because this is an audi, not a ricer. Well i was wondering if a 1987 5cyl.4000S is unusual. A 5 cyl. is unusual to me but all the parts i see for 1987 4000S is for a 4cyl. engine. And does anyone know where i can get a rear window.