Juniata does carry it, got two cans of Goex there this fall when I went through, think it was $16 a can. You must ask for it, they've got it in the back in a safe.
Hendershots in Hancock, MD, just off rt 70, has it as well, but again you've got to ask for it. I think they were at $20 a lb can. I try to pick some up whenever I go through the area.