Would anyone know a place on the net where I can download a simple graphic design/illustration contract?

And, is email considered a binding agreement? For instance, a simple discussion that goes like this:
1. Bob to do this illustration will cost x amount of dollars and I can deliver it by x date, afterwards all rights are yours. (send email )

2. (email response) Dan, the price is fine and so is the date. Look forward to seeing the finished product!
I know this is informal, but is it still legally binding?