You can get them at the farmers markets, I know that Green City Market carries them. You can also get them from Irv and Shelly's Fresh Picks. They get all of their produce/dairy/meat from farms in the area (they do get stuff from neighboring states). They deliver to your door like other grocery delivery companies. They do specific zip codes on specific days.
Irv & Shelly's Fresh Picks
5625 W Howard St, Niles, IL