First find out what year and model range those spindles fit.
Then post a wanted ad in the swap meet section. The more info you provide the easier for someone to figure out if their old used whatever part is useful to you.

•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-