Here are two possibilities I produced this afternoon. Nothing fancy, just cropping and text overlay in MS Paint:
I'm not particularly crazy about either one of them; the second quote is better, I think, but it was longer so I made the text smaller and am not sure how it works as a graphic.
Thoughts? Do you like them? Does anyone who has some time this afternoon and who is good at image-work think they can do better? I'd love to have someone more skilled than I am clean it up...