Dave
https://www.stovebolt.com/ubbthreads/ubbthreads.php?ubb=showprofile&User=3963
may have some answerers or suggestions, wait for him to chime in.

In the meantime, if it's just regular parts, bearings, seals and such take them in or the dimensions to NAPA and see what they can find.
Seals are usually not that hard to find by the part number stamped on them or by the dimensions.

Grigg

•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-