unlock code for sony radio fitted to focus 56?

Hi
Can anyone help me,I have had to change my battery on my car.When fitted new battery I found I had know radio code,I thought it was in folder supplied with car, but no.The info I have got off radio is,ser no V005947,Model C307/C214-CD6,part no 4M5T-18C815-CK,Sony item no CDX-FC214.I would be grateful if anyone can help.Thanks.