I haven't tried it, but I am pretty sure it is NOT. The 2nd gen like yours and mine has a bolt buried way down in the armrest that goes into the driver side frame. The pic above has a shoulder bolt sticking out and if that is the case it would be captured by something on the driver or passenger seat (depending if it is a 60/40 or a 40/60).
I looked in the junkyard for a solution myself even considering what you are looking at and was about to buy a little center seat / seat belt console from china when I ran across a pair of almost perfect explorer seats out of an eddie bauer. I grabbed those seats and a short center console out of a 94 ranger (with buckets).
I was looking at things like this:
I couldn't find the ones that used to be available at place like oreilly/advanced/autozone back in the 90's that were taller and you literally buckled em in like a center passenger and they just rode around in the center seat all the time (leaving the stock armrest up in the bench) for anything less than a ridiculous price.
Clutter Catcher Bench Seat Console - TSI Products 34215 - Interior Accessories
www.campingworld.com
That said, I claim it would not be a bolt in solution. If you can do some fab, I bet you could make that center arm-rest work, especially if you have a 2nd gen donor you could splice the 2 frames together and then use the foam and cover from the 3rd/4th gen. (just be sure to get a 60/40 with the bolt on the driver side not a 40/60 with the bolt on the passenger)