If you don't find them at the feed store, you can certainly order them from a reputable breeder online; your choice of hatching eggs or live chicks.
If you cannot, or do not want, roosters you would be better off purchasing live chicks and specify that you only want pullets (females).
If you cannot, or do not want, roosters you would be better off purchasing live chicks and specify that you only want pullets (females).