My mechanic says I have a cracked intake manifold and need to replace it, he says it is a long plastic part that is easy to fix. However I can not find the part online for my 2000 Saturn SW2, I can only find the intake manifold gasket and the manifold's I have seen do not fit the description my mechanic gave me. I am guessing the valve or tube that supplies the intake manifold is what I need to look for. Is this linked to my coolant problem?

I have checked Autozone and Pep Boys to no avail. Is there anywhere else I could get this part?

Help!