As far as the tapered bearings go. I'm not for sure they are still availible. When I bought my for my 54, Classic Truck Parts and Chev's of the 40's had them. Of course, that was for the 53-59 trucks, not for sure about the earlier ones.
There's nothing really wrong with the ball bearings. You can get them from just about anywhere from Autozone to Napa. Most of the supply houses have them too. Such as Chev's of the 40's, Classic, Golden State, etc... Federal Mogul/National still make them.
As far as the rest of your frontend parts, most of the parts listed for the 3/4 ton will work on a 1 ton. The biggest difference in the 3/4 ton and 1 tons is the 3/4 ton had different front springs.
Chev's of the 40's is probably the best place to look. They seem to have more listed the other supply houses.