I have finished the game three times, with a warrior, a dual class warrior-mage, and a dual class thief-mage, but there are some items that i could not findt. If anybody knows where i can find them, i would be very pleased. These are the items;
Plate of balduran
Sword of balduran
Shield of balduran
Staff of the magi
The blade of wave(halberd)
robe of vecna
Dak´kons zeth blade
Vhailor´s helm
And that´s all, i think, in return, i think i could answer some of your questions.....

I am going to go on assumptions for some of this, but someone else can probably answer more thoroughly. I think some of the items on your list aren't in the game, but rather are from BG1/Tales of the Sword Coast. Other items may only be available from "special" stores that only come with the Bonus CD's (dowloadable too).

Staff of the Magi is mentioned earlier in a post in this forum. It's in a house in the Bridge District.

The wave blade comes in parts. I don't know where you get all of the pieces, but I think the shaft is found in the Shaugassin City before the Underdark. Once you get the shaft and the blade, you can have it put together.

That's all for now. I hope someone else can give you more details.

I´ll check that out, but all the items listed below are in the game, i think, at least they are avaliable in the cheat creator.
One last thing, i do have the bonus-cd, so, ahere are the items, arrrgh, only 7 items left!!!

the wave blade is found on the shanguin prince (kill him or pick pocket him), just before the underdark.
The staff of magi is held by the twisted rune mage, through the rouge stone doorway near the lich's house.
All the rest is bonus CD stuff, which i can't get, but i have heard that some bonus CD stuff can be bought from a bloke other than Bernard in the copper coronet, and one other person in a different area who I don't know anything about

Juva will appear in the C.C and a woman trader will appear in the Waukeens adv' mart store if you have the bonus cd d/lded. Both carry good stuff and I think Juva has some of Baldurans stuff.

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All Balduran items comes with the CD bonus that you can DLD in this site, From a lady at the Rebalb store in the promenades upstairs.. She also has the Vecna robe and the veilor's helm.
Staff of the magi you get it in the bridge districs by killing a lich and his friends (you need a rogue stone to enter that house) The blade of Wave is in 3 parts or 2 I think but don't know anything of it.
Dak'kons zeth blade is in the copper coronet ( i think ) but ye need the bonus Cd to have this merchant in the copper coronet. He also has the +5 sling that don't need amno.

I love the robe! it is on my fighter-mage and it is a blast!

Where and what is a rebalb store?

Cheers.

The big store in waukeens promenades, there a dwarf outside next to the door. Ribalb is the name of the owner of the store Adventure Mart. the Dak´kons zeth blade is in this store too.
I played today and saw it in the inventory of the same lady merchant that sell Baldurian Stuff.