thermostat housing leaking.

[lostdude]

hi guys, i got a quick question regarding the thermostat housing where there is a metal tube that goes from some where belowthe engine into the bottom of the thermostat housing. Is there a rubber ring inside the tube, because its dripping pretty bad right now, image included below.
thanks for your help. if that ring is available anyone know the part number at ford?, i tried at repco but the guy insisted that i buy the entire thermo housing and he said it "should" include the rubber ring, i think he wasn't really sure either. thanks.