Audio interface Solutions for iOS

Hi,
Are there any audio interface solutions that will work with iOS? I don't necessarily need it to have a mic built-in to it, in fact, I'd prefer that it didn't. I'm aiming to record from my victor stream, tv, radio, (in other words something with a 3.5 mm out port) directly into the iPhone via an interface with a 3.5 or some kind of line-in port, so it won't pick up other background noise, which there is a lot of at my house, lol.
I'm coming across things on amazon, and even saw one thing on here, but the thing I saw on here has a mic on it already, so not sure whether that can be deactivated when I plug something into the instrument input port.
Thanks