Classic "Darksteel bastard sword"

I have tried to get this transmog for so long now, I just cant´t get it.It´s supposed to have a chance to be dropped by "Dark Iron demolitionist" But I can´t find it, I go exactly where it says that they are supposed to be.​​Im new, so is it something obvious I don´t get??​Thanks!https://ift.tt/3cM1fOh via /r/wow https://ift.tt/36lyy9S