Honestly I think the OEM nerf bars are the best because they use all 3 mounting brackets instead of just 2 brackets like almost all the aftermarket ones. A wire wheel can take care of any surface rust and then you can paint them with rustoleum and good as new!
Thanks guys. After looking around a bit I also think the OEM ones are the best choice. None available in my area at this time. I'll keep looking. After starting this thread I looked underneath and found the three mounting holes and seeing why the Explorer ones will not fit.