dear Mooch,
this is a special empowerment called 'life entrustment', which connects us with Dorje Shugden throughout all lives until enlightenment. Lama Zopa describes somewhere how he received it from Kyabje Zong Dorje Chang - there was one person too many in the room and Kyabje Zong Rinpoche said, "Who has bodhicitta?", and immediately Lama Yeshe jumped up and left the fortunate Zopa Rinpoche and the other person to get the empowerment. Geshe Kelsang Gyatso also received this empowerment from HH Zong Rinpoche i've read, but he himself only gives general empowerment, and i don't know who could grant it to you. Maybe some of our friends here will be able to help. Good luck -
yours, beggar