In case anyone is interested.. some old `Zork Users Group' items have been put up for auction..
Zork I Color Poster:
http://www.ebay.com/itm/331108962933...84.m1555.l2649
Zork I Dungeon Guide Map:
http://www.ebay.com/itm/331108960610...84.m1555.l2649
Deadline map:
http://www.ebay.com/itm/331108955510...84.m1555.l2649
Zork II Invisiclues:
http://www.ebay.com/itm/331108958122...84.m1555.l2649
Zork Trilogy Package:
http://www.ebay.com/itm/331108953625...84.m1555.l2649