Sorry, just saw this post now about the rear AC. 100% the 80 series one will not work. That being said, just throwing out hypotheticals, I don't see this being common at all. In fact its only the second photo of a truck with rear a/c I've ever seen. The lines for the barrier would look pretty bad against the a/c duct and the top bar would require an offset. Worst of all thought it would require being in front of my for detailed measurements.
Of course...it could be as simple as cutting out a four inch section and pulling the right side end in to clear the duct work, then making a top bar with a matching four inch offset. Hmm