Maine Powder House (mainepowderhouse.com) appears to have Schuetzen and Swiss, the first for $17 to $22, depending on grade, and the latter for $28.25. I believe the other powder sellers also have these in stock. MPH seems to be having problems with their credit card processing, though.
Just because Goex is out of business (hopefully only for a while),doesn't mean that black powder isn't available! We went through the same gyrations when DuPont closed, before it was revived as Goex. The holy Black was still available then, it is still available now.
And for what it's worth, I agree wholeheartedly with Joe on using REAL black powder.
~Kees~