Maine powder house,Track of the Wolf,Coonies,Powder inc,Graf and sons[only ones who let you order less than 25lbs].
The laws concerning Black powder are forcing many to stop carrying,In Eureka ca Bucksport is 22.00 a lb;and the only game in town.
If you have a black powder club,they should have it on hand.
Fed law is no more than 50 lbs,shipped directly to adult signature,may be distributed to club members,family and friends;WITH OUT MAKING A PENNY!! Otherwise you are in retail and have to comply with fed license.
Now really if you only have a pound or two,you're not doing your part.
Shotgun shells in break open types are great to use bp shells,track of the wolf can help with wads etc,and they are faster than some skeet loads,balanced
loads powder shot-volume.Lets not forget that all old firearms were made to use bp.