In a small saucepan, bring 2 cups turkey stock and the barley to a boil. Lower the heat, cover and simmer until tender, about 40 minutes.
In a large saucepan, bring the remaining 3 cups stock, the tomato sauce, bell pepper and cooked barley to a boil. Stir in the okra and scallions, lower the heat and simmer for 10 minutes. Add the turkey and shrimp and cook until the shrimp is opaque, about 3 minutes; stir in the hot sauce. Serve the soup with dollops of sour cream and more hot sauce.