The problem is that there are pieces in both boxes that are needed for the lift even if you get separate springs; you will have to get both and sell what ever isn’t used.
This is what i got from AutoAnything. they had the best pricing at the time.
Skyjacker Softride Lifting Leaf Springs - Rear
Part # FR36
Vehicle 1997 Ford Ranger
Submodel Fits the 2wd and 4wd Models
These fit except the mounting bolts needed to be replaced.
they are also working a little bette each day and settling a little not much but enough to re-adjust the front.
4x4, 5sp, Std Cab, Stepside, E4 Red
4” Lift - Coil-Overs, 6” SkyJacker Leafs - No Blocks (Mistake)
31 Spline FX4 Rear Axle, 4.56s and OX Locker, Hurst Shifter w/Optional Stick and "Made by Grev" alignment adapter