Did a search for arcanoweave and found nothing =)
For this you will be crafting
Pattern: Arcanoweave Bracers - Items - World of Warcraft
The pattern drops in The Arcatraz, pretty low drop rate but a lot of tailors on my server have it.
These cost 36 netherweave and 12 arcane dust to make.
On my server Arcane dust sells for 1.50g per dust, and netherweave sells for about 2.50 per stack. So thats 18g for the dust and 5g for the cloth, making it a 23g investment per bracer.
Prismatics sell on my server for around 30-35g (we have a huge inflation of price due to the high amount of pvpers still gaining s3 gear/weapons)
So thats about a 7-8g profit per bracer if you buy all the mats. I personally have a few hundred arcane dust lying around and the netherweave is cheap, so I make an insanely high amount of money from this.