I dont get it, i found most of the items you say "only available by hacking" in the dungeon, using the game i downloaded from the dmweb site, is there a glitch in the game ?
in dungeon master you won´t find the items listed as only by hacking.
(the conduit, the brown cape, the branch of a tree, the dexhelm and potions)
The staff of FTL had apparently no use for these items in the finished game, whether they used them as playtesting elements or simply forgot to put them in or they destroyed game balance, no one knows for sure!.
The basic PC dungeon (not engine, just dungoen) shouldn't have those items listed above, but many of the custom dungeons then incorporated them such as mine.
CSB has all these items, or their direct equivalent, if I recall correctly