Problems with back pain while driving is not only a function of adequate support, but one of motion as well. I have followed the progress for several years of research and product development in this area and see that the Ford Taurus 2010 offers this feature. There maybe other models…
Adv exerp… "Comfort was a focus, too, and for 2010 the Taurus is available with multi-contour seats for the driver and front passenger, complete with 6-way power lumbar support and a rolling pattern massage feature. The bottom cushion of these industry-exclusive seats included Active Motion, which provides subtle continuous movement to help the driver avoid back pain.
I think it’s worth looking into for anyone with chronic back pain willing to spend the money for this option. This is not a gimmick but a worthwhile feature for addressing back pain while in a prolong seated position.
Taurus happens to be a very good automobile as well.
Good luck in your search.