Both hoses that run from the blower unit to the defrost deflectors on my '52 Big Bolt were missing when I bought the truck.
I made new ones by using 1 1/2" sump pump discharge tubing (similar to Shop Vac hose) and 1 1/2" x 1 1/4" rubber fittings (PlumbQuick brand).
The hose is sturdy and flexible. The rubber fittings slip snugly (with a little spit for lubricant) onto the blower/deflector opening. The built-in hose clamps are nice. I did it all for under $20.00!
http://picasaweb.google.com/hillbilly6977/StoveboltHeaterHoses#
