I have read a few different posts on your search for an axle. At this point it might be best to ship the axle off to a vendor like Moser and have them identify the one good axle you have. Then have them make you a nice new pair of axles, or just the missing one if your budget is tight.
Who knows, they might even have a good used axle for you sitting in their stash of used axles.
Moser Engineering