junk yards usually don't have anything older than 6-10 yrs these days. and cj parts are non existent in bone yards. it tough, aftermarket panels can be junk, if you get aftermarket, they come primed, they say. scuff them up and prime them again, and then paint. i've seen new panels that rusted in a year or two.
i love cj's, put up some pics, and good luck.