Right now, only option for that exact style is junkyards, FORD, and possibly ebay. Those are 06+ Sport Flares. There are also XLT/Fx4 flares just like that, but is textured dark grey or black, instead of smooth painted like the Sports. Should fit your '96 so long as there are flares on it now. If not, time to drill holes.
Bushwacker has a similar style......called "pocket style". No clue if they make them for Rangers though. Pretty penny i might add.