Same thing happened to me so I went to a Ford dealer who was able to give me the code. Apparently there is some sort of master code which the dealers have.
The best thing was the guy didn't charge me!
Same as me, but the ford dealer did charge me, i think about �10 or so, so not gonna bust the bank. After I got the code I wrote it inside the back cover of the stereo operating manual, so check that or the car owners manual, you never know. Somebody else might have had the same idea.