You might want to look at this site ... carsbymail
It emails you as required with a list of cars ... not that many dealers are using it, but it did spot a 2.0 Selespeed yesterday ....
Alfa Romeo 147 - 2.0 TS Selespeed Lusso 3dr - Hatchback - Metallic Black
02 , 52, 38785 miles, £7994
Air Bag, Air Conditioning, Alarm, Remote Central Locking, Cruise Control, Electric Windows, Fog Spot Lamps, Immobiliser, Passenger Airbag, Power Steering, Trip Computer, Steering Wheel Audio Controls, Side Airbags, Side Airbags, Climate Control