As Telephone indicates, radio codes are randomly allocated to radios (and are cross-referenced to the serial number of each radio). It wouldn't be much of an anti-theft measure if every radio, of the same model, had the same code!
There are plenty of websites which offer to provide radio codes (for a fee). The problem with using them is that you need to remove the radio (in order to read the serial number), which can be a remarkably difficult task. Additionally you might find it hard to get your money back if the code you're given doesn't work.
Any Ford main dealer should be able to provide the code from the registration number (or chassis number) of the car. However they have to pay to get it from Ford, and then they add their own profit on. I work for a Ford main dealer; the standard charge seems to be £15.
Chris