Have you tried googling it? I know there are a few websites out there, but can't remember off hand what they are. I am assuming you mean from a perspective of keeping our minds pure etc? If I can find them I will try and post them for you.
Maybe you could check for free pod casts. I know Joyce Meyer did a series on battlefield of the mind, so maybe her website will have a free download. Or I tunes has free podcasts.
