Hey, if you are still looking for an artist, I think your project sounds interesting, and I'd love to work with you.
Here's my current portfolio. https://www.behance.net/emilycunningham10
I don't have anything to show for rigging or animation. I have pretty basic rigging skills, and limited animation skills, although I hope to change that. What I can produce should be serviceable for a demo, but if my deficiency in rigging and animation is a deal breaker for you no worries.
If you think I'm right for your project let me know :)