Bargepower
A2OC Donor
You have to be careful about this, some of the 2001 cars didn't have the correct "canbus" that the later cars had.
Hopefully someone will come along and correct me, but I think it is something that you would need to check before buying.
Steve B
You can buy a little gadget for around £18 that fools a later radio into thinking it’s plugged into a canbus car. It enables the radio to function correctly. I had one in my 2000 Pine Green SE 1.4 petrol.