You can google torah lectures and get the website done by the Yehuda Mond Foundation, they have shiurim there by Rabbi Avigdor Miller. Addidtionally you can google Simchas Hachaim Foundation and buy an ipod loaded with his shiurim on their website.
Torayanytime.org has pretty much anyone and tons of free downloadable shiurim! You can watch/listen/download (probably cant watch r’miller but in general) and its all free (though they can use donations so not a bad idea!)