Lower thermostat housing
 

I am at my wit's end trying to find this part online. I need to replace the lower part of the thermostat housing, NOT the piece attached to the 2-in hose. It is a 1996 Chrysler Concorde (3.5 L). Every search I've done for "thermostat housing, gives me the piece attached to the hose (which I don't need.)

Can anyone tell me what the lower part is called, where I might be able to find one, or how much it might cost?

Many thanks!