Update: apparently this message means a mod needs the Bloodmoon and/or Tribunal expansions. A note should be made of that somewhere in the description.
The Morrowind Mod History made a backup of the whole Planet Elder Scroll. You can find all the old mods there. (http://mw.modhistory.com/download-53-13085)
This mod looks great. I think that you should do for this mod something like the mod "Hide The Skooma".
Hide The Skooma.esp This mod makes your character automatically "hide" their drugs when talking to honest traders. That way you can still sell other items without having to drop your contraband. Also traders in criminal factions now have no qualms about buying them.
It is from the Mini-Mods, I had played with it for years and its great. http://mw.modhistory.com/download-53-14691
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They are also Contraband.
However, there is nothing like Nexus for new mods
Hide The Skooma.esp
This mod makes your character automatically "hide" their drugs when
talking to honest traders. That way you can still sell other items
without having to drop your contraband. Also traders in criminal
factions now have no qualms about buying them.
It is from the Mini-Mods, I had played with it for years and its great.
http://mw.modhistory.com/download-53-14691