I think you can do it that way. I know of others through DH's work who have found their own car and gotten the leasing company to purchase it, but if they aren't happy with it, they wont do it. When we did ours, we picked which car we want and colour/accessories etc and then the leasing company got it from us from their dealer - which was Suttons of Homebush (NSW) because they are a dealer for nearly all the manufacturers. Then Suttons delivered it to us when it was ready.