The British Council has been doing elementary podcasts since 2008, so there's a lot of material there. The first two seasons' podcasts are about half an hour each, broken into multiple sections, while the third season had shortened them down to about 10 minutes each. Most of them are covered by a creative commons license, which allows you to freely reproduce them. Each has materials attached.
As you would expect, the accents are mostly British. The speaking can get a bit fast, but the content and the activities are aimed at quite low levels.
