The way I look at this, anything is possible. It is my best guess that one could replace the reversible load floor with the sliding floor, if all of the respective parts were available, such as from a salvage yard.
A good example of this is the Jeep Commander. Initially, all were built with three row seating, but I believe in 2008 or 2009, they built some without the third row. On the Commander forum, some members did not want the third row, and took them out. Some members without the third row from the factory wanted the third row. All of the mounting brackets, bolt holes, etc. were there, so all they had to do was obtain a set of seats and install them.
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2011 Nitro Heat 4x4:
Bright Silver Metallic,
Dark Slate Gray; Customer Preferred Package 24C; Trailer Tow Group; Hood-to-Fender Stripes; Navus 2; Uconnect.
MODS: S/S Nerf Bars;
Mopar Chrome Rear License Plate Brow, Chrome Exterior Package, Production Style Cross Bars, Deluxe Molded Splash Guards, Cargo Security Cover, & 3.7L Emblem; Media Center 230; Kicker Speakers.
FUTURE MODS:
Mopar CAI, Door Sills, Pedal Kit; Carbon Fiber Dash Kit; Heated Katzkin Leather.