http://wow.allakhazam.com/db/item.html?witem=21906&locale=enUS;source=live
pattern:Arcanoweave boots
8 Bolts of Netherweave, 16 arcane dust.
Very high mats cost, but its cheaper than the vest on my server, and you can at least give them to the guild to start their arcane resist gear (and if you're lucky, get back a few of the mats involved).
The final boss of mechanar drops
http://wow.allakhazam.com/db/item.html?witem=21868
The mats are 12 Bolts of netherweave, 20 arcane dust.
Once again, not horrible, and its orange right on through.
The third part of the set drops in Arcatraz, and as such is a total pain in the neck to get. Also, 350, so its worthless for leveling at 365.
Seriously, no reason not to get 2 skill points and 2 pieces of arcane resist gear from leveling the tailoring.