Satrina's Impeding Scarab - 25 Man ToC, Faction Champions
The Black Heart - Toc 5 Man, The Black Knight
Corroded Skeleton Key - 60 Frost Badges
Essence of Gossamer - 5 Man AN, Hadronox
The Black Heart should be cake to get and the key can also be easy if you do Voa and dailies all the time. The scarab will take a bit of luck but with ToC 25 getting facerolled nowadays it should be much easier. Essence of Gossamer is off of Hadronox in AN. Very Easy
If you are having trouble finding loot get Atlasloot as an addon. You might want to also visit MaxDPS.com. DO NOT listen to their order of gear importance. It is wrong most of the time. Just simply use it as a guideline top find gear appropriate to your raiding level.