Rear Speaker/Defogger Housing

I have a complete rear defogger system in my 70 Dart Swinger, however I want to install to rear 6x9 speakers. I am looking for the housing that holds both the speaker and defogger motor on the passenger side of the package tray. I know they made them for the E-bodies, but I am not confident the same one will fit. Does anyone have one? I need the complete setup including offset mounting bracket like in this photo.

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I have one...