This is something that I think would sell like hot cakes. I believe us Gm's yearn for a greater depth of 'gear' that might be found with the denizens of Shadow World.
If you were ever to find the energy to do this, you might consider creating a set of treasure profiler tables. As in Ad&d they have already premapped treasure types to creatures, this cannot be done with shadow world specific entities. However, if all SW denizens could be assigned a treasure category according to their characteristics and profiled then you would l achieve the same.
Therefore if one was foolish enough to break into sulthang's lair, what would he find other than the documented items... Instead one might find some unique moderate useful items (rolled from profiling tables from within this Artifacts & Lost Technology book derived from the dragon Lord's own characteristics).
I ask you, how likely is the dragon lord to possess other items of ancient origin but just not mentioned in the existing books?
Next question... What would this do to invigorate a player group to do? Then noting the arrival and impressed with the import of Artifacts & Lost Technology book makes?
Would this group not seek more daring opportunities noting that they have a chance of discovering something truly new?
Food for thought maybe... Would like to support the creation of this, pretty good at admin stuff.