The skin is available, as several have stated above. If you collected 50 eggs in the second contest you should have already received the skin by in-game mail. If you did not collect 50 eggs during the second contest (no, once again, eggs from the first contest do not count) then you will not get the skin. The eggs are only useable for gold at this point. If you collected 50 eggs during the second contest, then contact customer support.