Nate-
Sadly the 94/95 model year Disco seats are very different as you are seeing first hand. Easiest thing to do is just sell those off and source a set of either 96-99 D1, or any NAS model year RRC seats. The benefit of the RRC seats is you get the arm rests and such akin to the seats in your LR3.
With enough fabrication anything can be made to fit of course, but from what I remember when I looked at it I waved off b/c it was going to be a royal PITA. Since then I've had cloth manual, RRC, and now power leather in Coyote.
If you can source RRC seats, get the rear one too, it's an upgrade over the Disco's 60/40 setup in my opinion.
Truck looks great!
r-
Ray