heres a really inexpensive way to get more lumbar support
Universal Inflatable In Seat Lumbar Air Bladder
theres a thread were a m/b member removed the seat cover and slipped this inside and reinstalled the cover. but it would work on the outside too.
were do you hail from? myself and jhm2k and 13dog all from the middle tn area and cruise to cars and coffee every month. you should stop by!!