Just thought I'd let you know that I managed to get the above UK & Ireland disc for £17 inc P&P from a German company on Ebay.

Here's another listing from the same company:

http://cgi.ebay.co.uk/Opel-CD70-CD-7...d=p3286.c0.m14

They also have a them at a buy it now price of around £39 inc P&P.

http://cgi.ebay.co.uk/Opel-Vectra-CD...d=p3286.c0.m14