Depending on where you get them they are not nuggets, they are chicken strips. Most places that serve American based food (hamburgers, mac/cheese, etc) have nuggets). I think it would be easier to ask people where they were NOT able to get allergy chicken.
I think I've seen them at nearly all the CS places, but I do know that the TS places are more hit or miss.
Oh and the turkey legs are on Sunset Blvd?. The path to ToT it's on the left after the shops and before you get to Fairfax Fare. Like maybe by the fruit stand if I remember correctly.