Your Op implies that you're familiar with hub service. If so why don't you open these up and deal with what you find when you find it. Odds are they only need a clean and grease, which is the same for all hubs. If the cones are OK it doesn't matter if they're totally unique since you'll reuse them anyway. As for the balls, I strongly doubt they're non-standard so you'll either reuse or replace them as you see fit.
In short, as the Nike ads say "just do it"
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