Megane 3 rca to usb conversion

Hi everyone, just bought a 2011 megane dynamique sports tourer and this came with two rca plugs instead of usb/aux inputs. Is it possible to change the rca module to a usb/aux module, and is any modification to wiring necessary for this? Can you guys point me to a supplier who can sell these to me and mail them to Malta? Pm me if you would rather not name suppliers. Thanks