I have recently bought a second hand Peugeot 306 D-Turbo and all is going well. However I don't appear to have the radio code. This isn't a problem for me at the moment, but may be in the future if I have to disconnect the battery. Firstly, how is this normally supplied? Secondly, is it possible to obtain this or do I have to get a new radio if I have lost the code. Thanks, Sean