My wife's '06 has developed a pretty significant leak on the passenger side when left out in the rain. It happens driving or parked. I've tracked it to coming from where the top of the heater box attaches to the bottom of the cowl area (Pics to follow, see yellow arrow). I removed the cowl to see if there is a damaged gasket somewhere and found a pretty smooshed gasket-ish thing under the plastic cover but I can't seem to find a replacement! Anyone here have a part number for this thing... Water leak investigation, needing suggestions