If you are just talking about the hoses themselves I just went to a local auto parts store and got the flex hose 1 1/2". I think I paid less than $20 for both hoses. One was 18" long and the other was 32" long. You can see in the picture below what I mean.

http://leahstockwell.com/truck/spyderradio1.jpg

above the radio you will see the hose. I am not sure if you have the same heater as I do in my 46.

http://leahstockwell.com/truck/heater.jpg


1946 Chevy Pickip