The first item is in Dreamwood inside of a cave.
The second is a drop from an optional boss in the Water Temple. (See walkthrough for how to get to it)
Third item is in the volcano, not the Fire Temple. When you find the first fork in the road, choose the eastern one. When you see what looks like a skull, examine it. Then go find the mad shaman who is along the western path. Talk to him and save. Return to the skull and examine it again. Be prepared for a boss battle which I believe is only affected by magic. It is some spirit and I think Solaar’s attacks should do plenty of damage.