Exactly how much hosing do you plan on doing? Is the local VFD practicing on it? There are critical electrical components under the rear seat, and in the dash anyway, and besides, adjustments don’t require they be electric. Recaro makes manual seats too.I thought that since the Grenadier is designed to be hosed down on the inside that having power seats may cause issues. Also it becomes another point of failure in a vehicle that is meant to be fixable in the field.
Come to think of it, aren’t many switches for door windows and locks now potted in all cars for operational safety in flooding? It ain’t that hard to make ‘em economically.