Serious rust above dash

I need to replace the part below the windshield behind the dash. There's some serious rust and I'm sure it's as a result if the rubber strip below the window frame not properly keeping rubber out. What is the piece called and what do you guys suggest since it cannot be fixed and needs replacing. I think it's called the cowel??? Is this the part between the dash and window frame??



http://ift.tt/1ksAgmo