I have bought a number of second-hand parts from Ian at M5 Saab recently, he advertises on ebay and his user id is 'm5_saabcentre'
He is a real 9000 nut, he has a well tweaked road legal silver Aero and a stripped out stage 3 Black aero for track days. He has been able to give me useful advice and then sell me the bit that I need to fix the car on a couple of occasions. He is based just off Junction 9 of the M5, I have just been down there last weekend to pick up two doors and a wing for the wifes car.
Highly Recommended