you have a customer!!! I'll buy one you make to replace the DIY I am also trying. I think multiple people on this forum would be interested, and could help recoup development cost!!
Looks like Taiko made their own - they didn't respond to a purchase request though.
Nenon used epoxy to join the H5 heat sink to the dynatron vapor chamber, rather than to a simple copper base it seems. I think it is an elegant solution, short of making a new heat sink assembly for the socket.
I think soldering the h5 heats sinks to the dynatron vapor chamber base would work, but one would need to be careful not to overheat the vapor chamber - this seems to take some experience and skill, different than the surgical skill I posses.
I am trying to adapt a narrow ILM 3647 socket to the H5 case, it is rotated 90 degrees in orientation to the case as compared to the ASUS Sage motherboard. Peter, please keep that in mind when designing your new heat sink assembly!!! 😉