Thank you ratna, any idea were to get a sadhana?
I don't know. I know of this one: http://vajrapub.com/product/vajrapani-the-pearl-rosary-collection/. But, if one wants to be pedantic, this is Vajrapāṇi Bhūtaḍāmara. The one with the longer mantra that was given yesterday was Caṇḍa from the same collection, the Pearl Rosary of Fifty Jenangs. The empowerment text has a note that says that the sadhana for Caṇḍa is that by Lopön Mikyö Dorje. That's a pretty common name and I have no idea who that might refer to.