released in 2011 and (as far as I can see now retired end 2011).
If you are trying to say with these requests, that this set also came with the
Head variants with Hollow stud, we will need some hard evidence for that. If
you can provide evidence, you can add these heads as alternate items to the inventory
of the set. We can't add alternate items to minifigure inventories.
So I can't approve adding a second head to the minifigures.