My local main dealer said that it would cost me �20 for them to get the code but it wasn't worth it as the code would probably not work. Quite a rip-off of customers who have bought their cars by Vauxhall who surely could do it cheaper and as a service to their customers than many places I have found on the net.
There are a few forums where members will provide the code free if you are lucky enough to post when they are about but I have had no luck down this avenue so far. I may as well buy a cheap �50 radio/CD unit to replace the radio/cassette than pay �20 to the main dealer.