Yeah as Estellios said: don't forget that NPC's sell mats too. And again, Mooglebox will let you know which npc (and their price) if you click on the 'purchased' link...even a map with their location usually pops u).

Also, if you do go and farm the NM's for that gear, most of those items will last you until at least your mid-40's. By that point, gear is MUCH easier to find on the wards.