Does Anyone Have An Karate Cake Mold Or Ideas For Karate Type Cake?

I would check ebay or www.kijiji.com or www.kijiji.ca for Karate Cake mold.
 
For an idea see this cake plate:
www.birthdayinabox.com
 
You could try designing a cake using the Karate club's patch
 
If you are not so artistically inclined with icing, purchase a few karate or ninja posed plastic figures and stick them on a regular birthday cake!