I got one from the cash and carry (Peterborough!) about £3 I think. Doesn't fit my car now as this one is bigger I'd let you have it but it might be useful to have one day.
Me and a friend are starting up a servicing business for friends and family, evenings and weekends only. We have just got one of those drive on ramps and hope to install it at the weekend at my home.
Simon, if you want to borrow the tool you are more than welcome to, or I can get you one next time I go to the cash and carry.