The page here suggests this might be there already on-demand through a support request. Looks like the pre-requisite is you must have your shoutcast url handy and the location must end in mp3. "As per another ticket (UI-386), Darren and Karl A have noted that this is already supported for the most part: Darren: On a technical note, we can allow the user to enter any HTTP or HTTPS url that they wish, however it must end in .mp3 to invoke the shoutcast decoder"