Too bad you're in South Dakota. A member in Georgia just posted about him wanting to move his loaded/nearly fully optioned LEER for his stepside... CLICK:
http://www.fordrangerforum.com/off-t...ll-camper.html
Stepside canopies/camper/toppers (whatever you wanna call it) are pretty hard to locate. Every once in a while, my local Portland craigslist and Seattle craigslist they pop up. But they're few and far between. I cannot name anything that will surely fit.....the bed width is so narrow, pretty much it's gotta be for a Ranger stepside/flareside. And when they come up, they tend to be priced higher than standard bed canopies.
Best of luck!!