The Pearl Necklace (below) is the successive rebirths of Kyabje Dudjom Rinpoche. Here is the link to the Pearl Necklace PDF translated by Bero Jeydren Publication on Sellfy listed as for free, Pay What You Want: https://berojeydren.sellfy.store/p/kjis/
In 2003, Lama Tharchin Rinpoche gave a teaching on Kyabje Dudjom Rinpoche and the Dudjom Lineage at Open Secret Bookstore in San Rafael, California and at Pema Ösel Ling, Corralitos, California on January 10, 2004 ~ Lama Tharchin Rinpoche is speaking in Tibetan with English translation by Ngawang Zangpo. You can listen to them streaming on SoundCloud with this link:: soundcloud.com/lamatharchinrinpoche. Both are also available for purchase at Heart Teachings by Lama Tharchin Rinpoche.
Here is the 2004 teaching as video & audio downloads for purchase: https://www.heartteachings.com/products/dudjom-lineage-2004-m4v-video-download
Here is the 2003 teaching as audio download for purchase: https://www.heartteachings.com/products/dudjom-lineage-open-secret