[Volcanic Shoulders]
Materials:
10 Rugged Leather (45s Each on AH)
1 Essence of Fire (1.0G Each on AH)
1 Essence of Earth (1.5G Each on AH)
2 Rune Thread (40s Each from Vendor @ Exalted)
Cost to Craft: 780G to make 100 x [Volcanic Shoulders]
Disenchanting Results:
222 x Illusion Dust (Sells for 3G Each on AH)
64 x Greater Eternal Essence (Sells for 12G Each on AH)
4 x Large Brilliant Shard (Sells for 4G Each on AH)
Value of Disenchants: 1450G
Profit: 670G
To summarize, if you were to buy 50 stacks of Rugged Leather (at an average of 9G per stack), craft into Volcanic Shoulders and disenchant, you stand to receive almost 700G in profit.
Where to obtain the [Volcanic Shoulders] Recipe:
This pattern is dropped by Firebrand Legionnaires in LBRS. Took me about 30 runs to get it. They're located in LBRS, at the base of the ramp leading up to Smolderweb. There are only 2 Legionnaires there, so this will take a lot of runs/resets - but definately worth it if you crunch your numbers using the above Disenchant Results. You could also sell the recipe on the AH for 300-500G - but it won't be bought by anyone unless they know of this method.