Does anyone have the radio code for my Rover (Phillips_?

Hi,I just bought a used car(1998)with a factory fitted radio/cassette,can I get the code to unlock it for free anywhere?.The serial number on the radio is RG594FW1032207 and the model is a Philipps R760 (22DC594/60E or B,I just can't quite read that last digit!,does it matter?.).
Please let me know by email if you can help me!.Thanks very much,Chris (greenchris47@yahoo.com)