Shadowchasers was not released as Open Gaming Content, so distirbuting it would be illegal, not to mention unethical. Asking for pirate copies on a board frequented BY THE AUTHORS is just plain dee-you-em.
I've seen issues of Dungeon/Polyhedron on EBay -- you should be able to find it there for a reasonable price.
(I wonder how many of the people on the Layoff thread whining about corporate greed have hard drives full of stolen gamebooks?)