Are you going to do the work? It will be expensive to have a professional do it right. Most will not want to touch the job unless you leave them with an open check book since they have no idea what truly lurks under all that brown gold. Plus you have to cut out the pieces from a donor car just right or the job will be harder. Everyone I know who has had this done always says they should have parted the car ans purchased a new southern car. You can probably find a very good rust free M8 for cheap. Plus if both rockers are rusted through there is likely way way more rust damage than just the rockers. I hate to be the Mikey downer of the bunch.