Repair or replacement of dispenser body ( not drawer ) ?

My Samsung Big Wash B1215J has a dripping leak coming from the dispenser body chamber ( into which the water feed tubes are connected ) . The leak is from the joint between the body chamber and the top cover joint . It drips from beside one of the integrally moulded cover to chamber plastic retaining clips
1. Where can I buy a spare dispenser body ( not the drawer - the part into which the drawer is inserted ) ?
2. Has anyone tried to cure this type of leak by removing the cover - cleaning the joint surfaces and re-assembling ( perhaps using a joint sealing compound ) ?