if you go the electric route I have a Corsa C variable Column from a low mileage 2005 car, and a manual controller I bought from a guy that makes them in Ireland, it plugs in to the port where the speed sensor would go, and has a control you mount in the dash somewhere, and you can dial in the amount of assistance you want, I bought it to fit to a Peugeot 205, for road rallying, but ended up selling the car again as it needed to much work. Cheers Chris