I had been searching that very thing — although none of the Asetek LGA 1700 brackets are in stock, there is a Thermaltake branded kit which I wasn't sure of, but some of the reviews are stating it works for the cooler in question. Thanks!
Hey. I’m sorry to break it to you but that backplate is for AMD. You can see how the backplate for LGA 1700 looks like on page 6 here. NZXT Kraken Z63 Manual
May have to wait with Nzxt or search for other compatible manufacturers. I recently built my pc and in case my kraken shipped without the LGA 1700 bracket I was planning on getting the thermaltake LGA 1700 bracket on Amazon as people left reviews saying it worked perfectly with their kraken coolers. It’s about $9.99 Thermaltake LGA 1700 Bracket