This is probably a long shot but I'm lookin for a stereo code for my misses fiat stilo I just bought her a 5 disc cd changer but didn't get the code with it
For my last car I found a service where you enter something and pay something like £8 and they'll tell you the code, I think I had to look at the back of the radio to get the code they want so they can help. That was a vauxhall and I believe the use the same Blaupunckt sterioes as Fiat so if you have no other luck it's an option.
take ye logbook to fiat they will give you it free.
or it should be written on the unit if its been taken out before.