Yeah, I found only the harness so far. I guess you're right, they only sell them in a package.
Another question if someone's into standalone use of the 40 kWh battery. I have only the battery (not the full car, so no VCM etc.) and I'm trying to get the BMS to balance the cells, but it won't do it. I read on many forums that the "Nissan Leaf 40kWh BMS is actively balancing the cells all the time, even during charging", however this doesn't seem to be the case for me. I'm reading the values off the CAN-bus on 0x7BB, which allegedely reports the status of the balancing resistors, but all the bits are 0s, confirming my suspicion that the BMS is not doing any balancing.
I'm wondering if somehow it refuses to do balancing if it can't communicate with the VCM? Maybe there's way to force the BMS to start balancing by sending some CAN-bus messages? Glad to hear any suggestions for what to try.