Used an old Schwinn Orange Krate front drum brake hub on a VeloSoleX I had years ago. They're made by Atom of France and there's a lot of replacement parts still available for them.
Similar brake hubs to the Motobecane economy mopeds of the 1970's.
It was an improvement on the rim brakes the VeloSoleX came with. Not that a VeloSoleX needs really great brakes, but for riding in town and alleys it is good to be able to grab the binders and haul your self to a stop in '15 at 18 mph.