Are you looking for a particular type? Moyer's Chicks in PA ships year round but they have plain ole white leghorns and Red Sex links--great layers--but nothing fancy--they also have POL Pullets and Cornish x's and can handle large quantities...
http://www.moyerschicks.com/MC-Web/DesktopDefault.aspx
http://www.moyerschicks.com/MC-Web/DesktopDefault.aspx