Actually, now that I think of it, I have a White Knight rig in my garage. I placed it on my 2002 F-150 & 2004 F-250. I love 'em. Attached thru the receiver hitch.
They wouldn't fit on my '07 Suburban so I put them up. Out of sight, out of mind. I guess I'll dig 'em up tomorrow and see if they fit right on the EL.
BTW, if anyone wants to see how the White Knights looked on my F-250...check out my gallery.