Z4 Roadster (E85) Auxiliary input adapter?

I am sure this has been asked a hundred times, but my search skills aren't the greatest and I couldn't find what I was looking for. I just want to add a 3.5mm audio jack to use Pandora on my phone. I don't want to lose or relocate my power plug. I have an iphone connector in the glove box that was there when I purchased the car. I see a wire tucked under the console on the passenger side, so I am assuming someone installed a kit for the iphone. I have seen kits to install a jack in the glove box, which is where I would like to install it, but none list the Z4 as an option that I see. I know these are compatible with other models, I just don't know which ones will work. Bottom line, I am looking for a way to install an auxiliary adapter or adapt to the iphone connector already installed. I am currently using an FM modulator, which functions but leaves a lot of sound quality behind along with a wad of wires. Thanks in advance for the help.