Thank you both for you reply. I am likely over-thinking some things. Of course VW used the same or similar size material. this certainly will work. From the cite Redrumm3
posted.
The EMPI VW Heater Hose for Type 3 Volkswagens is 63mm by 1000mm, contains no paper, and is made out of flexible aluminum flame resistant to 450 degrees. Reference part number: 616 211 29501.
The aircraft duct would work but at10X the price. I measured and ID is as close to 63 as I could tell with the old tube.
Thanks again . Love this Forum.