At least on my game. Been trying since release date to get this damn chest piece and I can't ever get it. Every chest engram has turned to Voidfang Vestments, xur has been selling Voidfang Vestments all the time. RNG is beginning to piss me off so much.
I can't for the life of me even get one from nightfall. I get any other exotic that I don't want.
-
It was my second piece of Exotic gear I ever obtained, first being Light Beyond Nemesis. Believe it or not I got it from Nightfall, sat in my vault for quite some time but I just upgraded it with Xur and have now decided I will use it after I score a nice backup helmet. Best of luck to you in finding it hopefully it comes soon.