i can see your dilemma. cap the rocker, or weld new ones. capping them would take less time, but might look a little funny unless you can find a way to hang your tupperware off the side of the truck when your not using the sliders. now on the other hand if you replace the rockers, IIC, nobody has replacement sport rockers which means you would have to do what i did when i did mine and thats find a 4 door set and also the bottom of the rear doors and weld them to the rockers. not to scare you but when i did mine it took about 10 hours or more per side to cut the rust, cut them, fit them weld them and body work them. thats both inside and out if i remember correctly. but thats not including (if you go this route) cutting them off a clean donor and drilling the spot welds out to separate them from the inner and outer. i know from doing my truck, and selling a few sports if the outers are gone, more then likely the inners are shot to.