Positive about this? It's been a few years since I was doing sway bar research, so I could be wrong, but I'm pretty sure that the Roush front sway bar (for 98+ coil spring trucks) is just the Ford 4WD Ranger (torsion bar front end) part repackaged. My Roush bar fits my 2000 coil spring truck perfectly.
Hillbank used to sell all of the Roush stuff, and they confirmed the sway bars were simply a stock 4wd Ranger part, plus the stock rear sway bar (see posts 14-15 of this thread):
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www.fordrangerforum.com
I've also pulled even larger bars from a 95-01 Explorer (Same torsion bar front end as Edge and 4WD Rangers) and held it up to check clearances against my 2000 coil spring truck and it passed the eyeball test just fine. I've still got it on my shelf, so I might be able to revisit it.