Originally Posted by Nostrum
Maybe you should try DeviantArt and find a sketch artist taking free commissions, instead of a group of costumers.
I'm with this. There's a (very slim) potential that you might be able to run across someone who is only interested in building their portfolio to get into art school or get long term employment. If you can find someone like this, probably through boards or the devArt communities people form, they could design it for free.