Wano, in Germany is the maker of the black powder I am currently using, packaged as Scheutzen. It (I think) is also packaged as Graff's, who sell powders in the States and ship (mail OR TRUCK) black powder anywhere in the USA.
The more you buy, the cheaper it is due to there being only one "hazmat fee" per shipment.
In my .69, I had to increase the powder charge of this 2F Wano powder to get the same grouping as the current GOEX.