You would need to read it from the REC or the CIM unit or such on yours as the current display does not contain a pin as its an early year one where the radio asks for a code when disconnected...

Can you not get the car pass from vauxhall?

To get a .bin file you need a eprom programmer such as a upa-usb.. Remove the 8 pin eprom in question with hot air gun / soldering iron, place into reader and then 'read' the chip in a hex format.. then upload to here