Inquiry for spare parts of pump of MAN

I am writing in regard to a part of the pump of MAN add blue system for Euro IV engine which we need urgently.
The part in question is a critical part needed for receiving water from the engine and if supplied wrongly,
might result in leakage of water and serious damage to the engine of the BRT vehicles.
We had ordered two complete sets of "valve, water cooling", but both sets have only the connector for connecting to the add blue tank,
and the connectors for connection with the engine w