rocker

Time for my yearly rocker panel patch job on the 96 XJ and I've decided to look into the slip on rocker panels I've been told about. What I'm wondering is if there are actual rocker panels specifically manufactured to be slipped over existing rocker panels, or do people just get another...

96 XJ here and I'm rebuilding what was once a huge hole in one of my rocker panels. I've riveted in 1/8" diamond plate aluminum for the backer support and now I've got 2 good coats of bondo on there. I'll end up going over the 1/4" thickness limit for bondo, oh well. So my question...