We have had these bulbs in UK for some time, but don't know if they are still available, they were being sold by B&Q the lookalike DIY store to Home Depot in US. There is an entry on this forum enitled "where to get this unusual bulb" and there's much info as to who makes these, I would think they're the same as the European ones marketed by Paulmann and Philips. They were imitation carbon filament, but actually a normal filament made to look like one. A squirrel cage version was also available, but without the false tip.
These modern cage lamps were used originally as lanterns on ships, but were later used in outside lamps for the house made by Noral. Also I think that production in England has ceased, but they are obviously still being made in Germany or Switzerland.