I first found the Venom costume in a special shop that sells babies' and kids' equipments. It was too expensive to my standard. Yesterday, I found Venom costume (along with Ultraman Costume. Imagine THAT! And no, the mask is not made of steel or tin or something...) in a Factory Outlet. Since I'm a member, I got a ten percent discount. The price is 50% cheaper than the costume sold in the special shop!
Last night, Aza suddenly became The Venom, or Bad Spidey, as he called it. He even wore this outfit when he slept.