I am not a graphic designer but a programmer. Recently i wrote a short story in answer of a technical question. Then I realized if i convert it into graphical comic book story then it would be more interesting and understanding.

I have many characters/pose in vector form. And am looking for some backgrounds which are generally be used in comic books like city,lab,planet,universe etc etc.

Can somebody suggest me a place/site where i can find them. I tried to bing/google them but they searched wallpaper with super heroes.