| Firstly, you mentioned druids. As far as I recall, druids and clerics suffer no restrictions on their divine spellcasting through wearing any kind of armor, including plate. Jaheira in my games, for example, wore plate throughout and was always able to cast spells even in the vanilla game.
Arcane casters are the ones who lose out if they wear anything other than robes (or certain elven/drow chestpieces). The links quoted above I hope will lead you to the mod you wanted.
If not, there is another option. At Pocket Plane and other places you will be able to download 'Near Infinity'. This is the editor I used, although others are also available. With this utility you can update any object in the game. I used it to modify the 'Armor of Faith' so that my Cleric/Mage protagonist could cast arcane spells while wearing it. It's very easy to learn to use, and any items you wish to modify are easy to locate with the search facility. |