could you describe it in more detail? Does it look like an attachment to a vacuum cleaner one puts on the hose? Is there one for each side and do they look the same or are they right and left? If so, I may have one or both.
There is only one on a coupe. It is hard plastic and rectangular in section with a bend, and carries air from the heater/air box directly to the front vent just below the air controls and above the radio (if you have one).