Supporter Plugin - Bandwidth

I am loading the Supporter plugin today. I see wher eyou can provide more storage as an upgrade to blog owners. However, we are a media delivery company that is also building in the ability to add audio, video, and document delivery with in each post.

Is there an existing plugin or function that can monitor bandwidth used as well as storage? Or at least charge for it? We also have live broadcasting which we can get reports on bandwidth used from client logs. We are wnating the user to be able to monitor and add additional storage and/or bandwidth to their account using the Supporter plugin.