How Do I Get a Podcast Sponsor?

DW wants to get a sponsor for his podcast, Headline Minute with DW. He's hit a plateau on downloads and wants to expand his reach, and he thinks a good sponsor can do that. Leo says that podcast advertising is a very hard thing to do. Leo didn't even try for over a year. Leo then charged about $70 per thousand listeners, and he really needs an agency to do it for him.