Hi, Lois,
For yourself or for anyone who is interested, the entire BBC Scotland production of Sunset Song is available on YouTube. It was originally broadcast in 1971, and then broadcast on PBS' Masterpiece Theatre in 1976. Sunset Song starred Vivien Heilbron as Chris Guthrie.
https://www.youtube.com/watch?v=ZQEYysEz7X0&t=221s
https://www.youtube.com/watch?v=GRBjcfWyDbY&t=185s
Unfortunately, the audio track is slightly out of sync, but it is still a beautiful dramatization of the greatest Scottish novel of the 20th. century.
I've been trying to track down the later television broadcasts of Cloud Howe and Grey Granite, with little success thus far. If anyone knows if the DVDs (or VHS videos) were ever released commercially, please let me know.
If you're planning to do any of the NC500, I'd highly recommend Brigid Benson's North Coast Journey. It's a beautiful book (trade paperback), filled with stunning photographs, history, and practical information. There are still some copies left on Amazon UK.
Mike (Auchterless)
Update: I just found Cloud Howe on YouTube. It appears to have been posted there recently. Now I just need to find Grey Granite!