That sounds AWESOME!! I'd love to see it when yo're done, so you should post it ;D. Although, about the materials, I think you might want to check out various arts and craft stores. I get my art supplies from a store called Micheal's...
I'm not up to much, just trying to think of something new to draw. I have to be in a certain mood to draw, and I was in that mood yesterday, but my mom killed it when she made me load our dishwasher DX It's suprisingly hard for me to get back into my drawing mood once it's ruined...