Heater Help Again

Hi does anyone know of someone that sales NOS or rebuilds the vacuum part, on a fresh air heater( I don’t know what it is really called,) the part that makes the defroster door open. It’s a vacuum thing on the heater distributor assembly on the fresh air heater unit 1964?

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Thanks for your help again Jon

 

They're a generic part back past about 1970.http://www.ecklers.com/product.asp?pf%5Fid=41357&dept%5Fid=1193

 

I had one of my cans develop a leak so knowing there would not be a direct replacement, I elected to open it up. Un-crimping very gently (marking location) I could see the diaphragm had weather checked and would no longer hold vacuum. I cleaned the diaphragm with thinner and air dried. I then placed a thin coat of red RTV over the entire surface and let dry. After drying I then re-assembled, aligning my previous marks and gently compressed the crimp zone while crimping a little at a time and going around about three times. Placed a vacuum on the unit (with vacuum gauge attached) over night. The unit is back in service.