Welcome to the board, Daemoj!!!
As someone who had at one time a plethora of saved games - I'm not certain that a collection of them will assist you in compiling a list of the various magic items available in the game. There was a list of such things in the back of the Tome of Misinformation (strategy guide). I don't know how accurate that list is.
You're best bet for the mapping is to do as Bungleau suggests - just make your own as you explore.
Do you have a particular project in mind for which you need this information and maps - or do you just like to be very thorough??
Wyv
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