They're not Premier League but rather Champions League cards. The product was released as a boxed set of 105 cards, 104 base card set + 1 randomly inserted chase card. You got either an auto (1:10), jersey (7:10) or WCCF base card (2:10). Here's the Panini product page link: Panini
You used to be able to order boxes direct from Panini Italy but there were only 5,000 sets produced and I guess they sold out already since ordering is no longer an option.