I know, i know!
I have many AMD rigs and love watercooling, especially VRMs and such.
Unfortunately the few blocks vailable are mostly now end of life. The UD7 and Crosshair formula-Z has a block for each but both are end of life and will have to be found via second hand markets. I have just replaced one of my Crosshair Formula-z boards with a block for a different socket, cpu combo (for a z87 OC and blocks). There is one or two sold by heatkiller (or was) but tbh they are generic VRM blocks with different cut copper sheets screwed onto them and imo they dont look very nice compare to their other blocks or any of EKs blocks.
Best bet is second hand markets. Shame you don't have access to MM cause i have the Crosshair and block on there. Unfortunately due to the expense of watercooling, you rarely find people interested in AMD mobo blocks, so probably by the time you have access, itl still be there. lol