From disassembling a 2018 (40kWh) Nissan Leaf battery I have some things that might be of interest to someone. Location: Netherlands, 20 minutes north of Amsterdam.
-battery shell including connectors / service disconnect without the plug (pickup only, free of charge)
-bms unit plus some wiring (€100,-)
-contacter module with current sensor, some busbars, etc. (€100,-)