You simply love so and so character/storyline, and can't find icons anywhere? This would be the place to make a request. Maybe some kindly stranger will take you up on it!
(including some panels would be a bonus, of course! scans_daily, Comic Book Resources, Cover browser, Comixology, or just plain old google would be a good place to start.)

If you have any questions, comments on, or suggestions for this community, they go here.