For five bucks I'll do a little sketch for you--not a super duper crazy-detailed thing, but a fun sketch that I'm pretty sure you'll dig. I call them "fourths" because of the size: they're 4.25" x 5.5", one fourth of a sheet of cream-colored cardstock.
You can see some examples here on my Flickr.
If you like stick in a word or two suggesting something, although the more vague the better, probably. Like "lazy cat" or "drunk politician." In the absence of direction, I'll just let my creative juices run free and stain everything.