RADIO/CD PLAYER B8185-8M800 MODEL CODE: 14787220 SERIAL NO: 0045778?

LOST MY RADIO/CD PLAYER CODE FOR NISSAN, MODEL CODE :14787220, SERIAL NO:0045778, MAKE NO: B8185-8M800, PLEASE HELP AS I BOUGHT THIS VEHICLE FOR MY WIFE AND SHE TRAVELS ALOT WITH NO MUSIC, AND CANNOT STAY AWAKE WITHOUT HER RADIO AS HER COMPANY, PLEASE HELP A.S.A.P.