Try NAPA for the heater motor.
Here's a thread about those choices, cheaper and no shipping if you have one near by.
https://www.stovebolt.com/ubbthread...6055/Easy/cheap_heater_blower_motor.html

They might have the fans too as a universal type part (not by application), worth asking.

•1951 GMC 250 in the Project Journals
•1948 Chevrolet 6400 - Detroit Diesel 4-53T - Roadranger 10 speed overdrive - 4 wheel disc brakes
•1952 Chevrolet 3800 pickup
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"First, get a clear notion of what you desire to accomplish, and then in all probability you will succeed in doing it..." -Henry Maudslay-