The Darkest of the Hillside Thickets generally go around to sci-fi and game conventions. I'f found most of their stuff available only from Pagan Press or Wizard's Attic. IIRC, Pagan Press is at www.paganpress.com, but I could be wrong (I know they're linked from the site at www.gamebase7.org on the links page (I wrote that page) though...)