Is there any way to gain the endless special quality without carrying around a small necromantic magic item?

Dragon Magazine #354 has a fairly well-known special quality called endless, which prevents aging and all its normal effects, but is unfortunately not actually granted by its associated feat, Wedded to History. Within the pages of this magazine, the only way to gain the quality (DM fiat aside) is to have someone cast kissed by the ages on you, and then to forevermore give up a magical item body slot and risk taking a penalty if you ever lose the item–which also radiates enough necromancy to make many NPCs very uneasy.

But what about methods outside the pages of the magazine? Is there any sort of feat, feature, or other special means by which someone can gain this extraordinary special quality, without needing to go around holding a pseudo-phylactery?