Try and take some really good screen shots. Then bring them into Photoshop and remove the rest of the buildings, so only the build face you want remains. Then using Paths, you can outline the building face as a vector drawing and save it, and then use in Illustrator as well. Not to mention, make the build look 3D in your draws using perspective.
I learned this from Freddie Williams who wrote the book, "The DC Comics Guide to Digitally Drawing Comics."
You can even kind of see what I mean in one of his YouTube Videos.
https://www.youtube.com/watch?v=TT2v7YIcl4EHope this helps!