rocker panels fixed plastic covering

Need to get rockers on my 01 explorer sport done. The problem is they said they dont know if they can put that grey palstic thing back on. the plastic part that goes over the rocker. My question is how hard is that to get it back on? will look stupid without that on it. they said the rocker has holes in it that the plastic covering clip into. So i guess you need to drill holes and line it up?