I know this is a old post, but I'm in need of the same thing. My 2004 150 has only 60,000 on it and the seat cushionds have been going bad for sometime . The material that was used is pure Crap and would stain with just a drop of condensation from a cold drink can.
I was hoping there is a aftermarket cushion replacement but may have to resort to covers for the entire seat, back and all.
Help if anyone knows what can be done ?????