Using 30 yr old part numbers can be a real pain, but this appears to be easier than this whole thing has played out.
The dana 60 axle was used by all of the big three, and all of these parts are almost a direct replacement. The exception would be the spindle length, and stub shaft length, but for this purpose, pretty much identical.
Since you have one locking hub assembly that is good, why not take it apart, clean it up, and use it to identify the missing components? You can then, with parts in hand run down to the nearst dealership. I would actually run down to the chevy dealership, since these 60 axles were available for a longer period than the ford or dodge.
With the correct parts in hand, you can easily match up the identical components.
This should be a very easy fix.

If not, are these original Spicer units?????????
If Yes, care to sell them, even if one is incomplete????? Could help offset the cost of brand new Warns..... Pm me if interested please.