I don't know what this part is called but I need to replace it and I took it into a mechanic and they couldn't order it. Where can I find it?? It is the part in the picture that the intake air temp is going into to.
It sounds like the part you are describing might be the outlet duct, the flexible boot and elbow all appear to be one piece
The part in this link is a little pricey, you might be able to find one in a junk yard. Note that the '06 - '09 Buick Lacrosse uses the same part according to the link.