Hi does anyone know if those black bed rails that come with some rangers would fit on a flare side? Do they even exist? Links to eBay or craigslist would be appreciated. I live in Nebraska if there are any suggestions for junk yards. I also may be willing to buy directly from anyone who has some. Thank you!

Should fit just fine, only difference between flareside and regular beds is width, not length.

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1993 Ford Ranger Splash 4.0
Regeared to 3.73's, Ultra 15x7 rims, 235/70/15 Yokohama Geolandar AT/S tires.
Mods: plastidipped grill and header panel, Throttle cable mod, aftermarket projector headlight and corners, Alpine CDA-105 Headunit, 2 MTX TS82 8" subs in trick boxes, strobe lights on front of truck. K&N drop in filter, 2.5" exhaust after catalytic converter to a Thrush Welded muffler, pipe exits at stock location.

OK good. Do you think it would be possible to modify the rails to fit on the truck WITH a crossover toolbox?

Also this probably isn't the right thread to ask something like this but what are some other good mods for a flareside? Interior or exterior