Some ways to listen to old Paul Harvey commentaries are through WGNPlus.com or YouTube. WGNPlus.com has Paul Harvey audio archives that feature many short audio clips of the radio personality's broadcasts.
NPR.org points out several important Paul Harvey commentaries and includes embedded YouTube videos for "Freedom to Chains" and "If I Were the Devil (How to Destroy America)," as well as high points of his weekly segment, "The Rest of the Story." NPR also features additional information about Paul Harvey's career. TheAtlantic.com features a transcript and video of Paul Harvey's famous speech, "So God Made a Farmer." The speech was given at a Future Farmers of America convention in 1978.