I used to have a 2004 Vectra SRi and it had two outlets - one in the front and one in the back - no cigarette lighter though. I didn't know they weren't standard, I guess it depends what trim level your car is.
I'm not sure how difficult it would be to fit, but to save money, most manufacturers preinstall a lot of the wiring for equipment, so you might find the wiring ready to go.



