I've been out of town for a few days or I would have responded sooner.
I have a Humphry light in my house.
I live on the road system and propane is usually about the same price as gasoline, currently about 4.75 locally.
My light is left over from before 1985 when power came to town.
As far as I know everyone knows about them, if you don't have power you get propane lights, nothing less expensive and adds some heat to the room.
Sampson hardware is the source of parts in Faribanks, I broke the mantle on mine changing the window that is next to it, I've been meaning to get a new mantle in town for the last eight months.
I could always tie a Colman mantle onto the little ceramic ring but the factory Humphry mantle is better.
I would promote these lights in some off the grid living magazines, they provide a good light, and the off the grid people often have propane stoves already.
They are great companion item for people with the none electric propane wall furnaces also.
More ideas may come to mind, but many people in Alaska are aware of the propane lights.