Son, your rear end is in deep trouble.
Relax! You will fix all this in time, a month, six months, a year, you will have this fixed better than before.
Here is the first page of a number of pages for you to use. This "should" be your axle type. Year is 1942, brand is Chevy, should be no differences or very little. Even if not precisely the same, this will provide an excellent overview of almost all rear axles of the era.
1942 Chevrolet 1-1/2 Ton Read and view those pages so you will develop a good understanding of what you need to do. After this, simply a matter of finding parts, which is never simple. Nonetheless, you will eventually find all your parts, I would bet within three months. Watch Ebay, daily. Search the web, visit forums, run some "parts wanted" advertisements at forums like this one.
Should I or others come across some parts or part sources, we will let you.
Billyray
