Dvd Adapter Where Can I Find A Dvd Adapter Or Player For The In-dash Screen On My 2008 BMW X5, 4.8L?

Where can I find a dvd adapter or player for the in-dash screen on my 2008 BMW X5, 4.8L? - dvd adapter

I have the script on the screen of my X5, but I want to play DVDs on it. To do this, I need some kind of adapter or a special player. Where can I get it? Online or preferably in Washington, DC. Thank you.