Have you tried contacting a Ford Dealer or Ford's own web site. quoting your vehicles registration number and the make & model of your radio, if it was the radio fitted at manufacture they should have the code on computer.
I also have the same problem. I bought a 2007 Focus C-Max second hand with a Ford 6000 Radio/CD player and have changed the battery and don't know the code. I pressed 1 and 6 and it says FB 05-01-02 and BL 02-02-02 don't know if this means anything.
Can anyone help? Thanks