The EL (131" wheelbase) and standard (119") running boards are quite different. I'm seeing $1300 (the extra zero is not a typo) for a pair to fit the standard model!

The step bars (in the "off road" package) run $700 for a set. I have these and they're actually quite nice.

One source of pricing: Ford Parts Direct Online: Buy Genuine Ford OEM Auto Parts & Aftermarket Accessories, Wholesale Prices

-- Chuck