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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Bought six 1. Young Ahamkara's Spine 2. Khepri's Sting 3. No Backup Plans 4. Claws of Ahamkara 5. ACD/0 Feedback Fence 6. Nothing Manacles (good thing I hadn't bought it yet)