Where do they sell belly piercing kits, NOT online?

I wanna pierce my belly, and i know it's 16g and you cant stretch it to 16g. But my parents don't want me to get one, so im gonna do it myself. that means i CANT get it online, so doesnt anyone know where to get the 16g needle atleast?? I want to pierce it ASAP. if your gonna say "dont pierce it" or any of that, dont say nothing.