How to add audio auxiliary input to mazda 6 wagon 2007

Hello guys,

I would like to add an auxiliary input to the basic radio in my mazda 6 wagon 2007. This is the original radio with only the CD player... no tape deck, no sirus etc.

It seems to be complicated to add this option. By the way, I do not want to use a modulator (connecting to the antenna), I want a direct access for best sound quality to connect my iPod.

I have already gone through a few threads, but I really just want to know where to go to have that option installed...

thanks for your help.