Hi Heather,
Our cartoonist (my wife) can do that.. Check out our samples link @ the sig.. Turn around time is usually 2-3 days for a single character.
As I'm experiencing icq problems, shoot me an e-mail to arty(at)a-worlds(dot)com for pricing and details if you are interested.
You may also check that flash game we've done as it includes cartoon work of easton that might give you an idea.
http://www.makebling.com/wastegame.html