As of yet, I haven't been able to find a black series stormie, go figure.
Not sure what size his nub is.
The current one is close but tight to the legacy space trooper nub and a bit tight for the tac stormie nub
I was able to adjust fit for the space trooper nub on a casting with a dremel in about ten seconds. Pic is forth coming.
Working on molding up a hollow version now that will accept the tac stormie head.
Going to list the nubbed version tonight for $2.50