Need help with quest item locations

So.. Where do I get a bunch of stuff related to finishing quests, For example,


Ghostly Robes
Hazeels Mark
Silverlight
Dragon Longsword
Helm of Neit
Ancient staff
Elemental Shield
Crystal Bow
Etc

If you have the answers to the above id like to hear them, or more, sense most of the times when I am online, I have nobody to ask. So this information would be a great help!!