Re: Wet foam in cushions
....kinda off on a tangent here:
Several years ago our daughter-in-law's car was flooded with run-off.
I propped the seat components on edge across our tailgate net and made the commute to/from work for several days, reversing the wind-facing edge each day. After they were dry (and much lighter), they were vacuumed using Love My Carpet. That was over five years ago and the seats are still quite nice to this day.
Now, if the seats do have wood backing, at least drill several hole saw plugs and stand the seats on edge. If you can detect a plastic lining over the foam....well, it's gotta go if you have any chance of drying the seats.
Additionally, you can use a wet/dry vacuum over the hole saw plugs to extract quite a bit of water...just go gently.