I haven't seen any threads about these gauntlets, but this is how I got mine:
After buying the P&T, I bought one engram from Xur as that was all I could afford. On the way to Rahool, I was saying, "Please, I just want the new gauntlets..." over and over. And Rahool gave me Khepri's Sting! This is the reason I still go to Rahool. Because Ives won't give me -blam!-.
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Edited by Vic: 5/29/2015 11:01:58 PMI bought engrams in search of the feedback fences... I got: 5 ruin wings 4 khepri's sting 4 nothing manacles 4 sunbreakers 1 no back up plans And I finally got the fences after all of that [spoiler]and I leveled up my cryptarch twice, each package taunting me with a legendary gauntlet engram[/spoiler]