From reading user reviews and testing a fair few rubbers my list would be:
Daiki:
Mantra Pro H
Hammond Z2
ESN:
Rakza 9
Quantum X Pro
Still there is no direct like for like replacement for D64 between its durability, light weight to sponge hardness ratio and low spin sensitivity (while still able to grip and spin the ball decently).
The closest would be a heavily boosted Glayzer but I would think it’ll be abit too soft and high trajectory vs your stock standard D64 out of the packet.
If you use D64 for block and punch on the BH with standard shape, you could take a risk of adopting Cybershape with koto and the list above will fit better, but big assumption on my end, I’ve never seen someone use D64 on the FH even TPH, though I’m sure there may be some.