I have a completely dud HYLO bulb which has an ok base from around 1900 (porcelain insulated). Both filaments and the tip are gone, so it's worthless now. I was thinking about the possibility of using its base to fix a HYLO bulb like the one on that auction you mentioned. I would send this bulb to anyone who needed it for this, as long as they pay the shipping.
BTW that's the 3rd baseless HYLO bulb I have seen on eBay. There was another one a few months ago, item #3281763666.