I found this J1772 to NEMA 14-50 adapter online which should permit the FCSP CCS connector to be daisy chained to any NEMA 14-50 based 240v mobile charger. I don’t need it so I haven’t tried it but have a look.
http://modularevpower.com/Sales_J1772_to_NEMA_14-50_Adapters.htm