find all pvr:// links?

Is there a way to find all the pvr links using json calls?
eg The addresses that can be added to Favourites from the PVR Channels menu.
pvr://channels/tv/All channels/pvr.mediaportal.tvserver_738.pvr

I have tried using the PVR group of functions and the files.get_directory functions.
There seems to be no way to link the PVR channels with their url containing the uniqueid.