Originally Posted by SmellMyWort
If you want something a little more original, I'd check out the local college paper. They often have student-produced cartoons/funnies and a budding artist might be willing to draw something up for you for a small fee (or case of beer).
Or look at local Vocational/Technical Schools that have Graphic Art and Commercial Art programs. Often times the instructors of these programs are looking for projects for their students and you could get a cartoon or caricature of yourself done very cheaply or even for free.
That's how I got a caricature of myself done.