Surprisingly, I couldn't easily find whole packers in the south 'burbs of Chicago. The local grocery stores don't carry them. Either does the local Sam's - only flats. Asked the "butchers" on a couple of occasions about packers and they looked at me like I had two heads
Been disappointed in Sam's lately. A week ago they didn't have any Boston Butts or Chucks on a Friday afternoon.
Found a local butcher that carries them but they close at 3pm. Very inconvenient.