Your room's computer. You can buy things from the online store. OP (original poster) was looking in the Outfits section, but the item in question is actually in the Other section.
Oh, and OP's mention of a "Levi", is their Android's name.
Hey. I'm at the point where it says I need to buy Android's human outfit as well, but I can't see it in the Other tab. Is there anything else I need to do?