Without pictures of the PCB, I would be hard to determine, Byski may make one they have made for niche blocks in the past (RX Vega Nano). What country(s)/regions does Manli sell in, I've never heard of them.
Your best bet may be a "universal" water block, which is basically a block for the die and a fan/heat sink for the VRMs. Not nearly as pretty as a full cover block, but basically the same performance wise.