TiVo Plex Channel - Season and Episode Info?

I decided to play around and see if I can update the TiVo Plex Channel.

The Channel basically pulls the content using the standard xml extract and serves it to Plex using the standard solutions.

Plex is unable to provide art work because the Season and Episode numbers are not part of the basic source metadata. I know this wheel has been solved several times - can anyone point me to a solution I can look at?