The last market to buy new Hella E500 headlights (Japan) and then swap lenses to US/left hand traffic now appear NLA.
I bought a pair of Hella E500 headlights in June and received them for one of Jono's mechanics. Ordered another set for my personal inventory in July and they are not in stock with no scheduled delivery. Will give the Seller another month before I request a refund through my proxy bid service.
If this holds, then there are no more available, save for maybe one side of the US headlights.
E500 lenses appear to be still available, though.