This is far from an inexpensive solution, but if your finances allow, you might look into Recaro Orthoped seats (
https://www.recaro-automotive.com/us...ecaro-orthoped)
I've had Recaros in three cars over the years, and they're amazingly comfortable, especially for long hours on the road - I'm prone to lower back pain, and have done more than one 12 hour, multi-state stretch with no resulting discomfort. To at least some extent, the cost can be offset by moving the seat(s) to another vehicle when & if you replace your Dakota - seat track adapters are available for a wide range of vehicles.