At this time of year, your probably gonna have to order them online, hatch them with an incubator, it but them on Craigslist. Otherwise Tractor Supply and Family Farm and Home had loads!
Without knowing your location it's a little harder to say. You also don't specify if there's certain breeds or genders you want which might be making your search harder.
General answers would be feed store, private breeders, online ads, hatcheries.