Try contacting a hunting preserve and see if they will provide you with some eggs. HOWEVER, if you hatch them yourself, be prepared to hand feed the babies. They do not hatch ready to eat and drink on their own like baby chicks.
I have heard of people using doves and pigeons to hatch eggs, but you'll still have to take the chicks away from the hen when they hatch. Plus, they can only handle 1, 2, or 3 eggs (depending on size of the eggs & size of the bird). If you want to hatch some chicken eggs, get a good broody hen - a chicken broody hen. She'll do 100% of the work for you. She'll incubate them, feed them, keep them warm, and teach them how to act like a chicken.