I imagine there's still a few floating around with various smaller dealers who aren't 'in the know' about Peru being closed and the high collector value (at the moment) of S. gigantea. I imagine if you canvassed every exotic pet shop in a given state, you'd find one or two. I seem to recall them being a little pricey to begin with, so some shops may not have sold theirs yet. It's only been what, less than a year?
Naturally I'm looking for them, too. Trust me, if I land any, they'll be available.