Look carefully at the position of the woodruff keyway compared to the direction of the spindle axle. This is where the left and right side spindles are different.
Even though badly abused, it might be possible to save the hub. You can take out a badly damaged inner bearing race with an arc welder (stick or MIG) by welding a good hot continual bead around the inner circumference of the race. The welding shrinks the race and it comes out easily. An Oxy torch on that same race will probably nick the hub, as you usually can't see through all the rust, muck, and buggered metal.
Both the hub and spindle (and grease seal) can be ordered from this site.
Paul in MN