Picked up a set of T&D roller rockers off the board . Upon taking them apart for cleaning and inspection . I found that on one rocker the oil passage that feeds the valve stem roller tip is "NOT" drilled all the way thru . meaning a oil supply to the roller tip will not be avaiable if the rocker was put in service . being the way it is , it is imposible to drill it out with the roller tip being in the way . what are my options ????????? thanks .