Hey you guys, with the latest changes to legendary crafting materials drop rates most people have started to get a decent amount of materials. The hardest part of crafting how now changed to the blue materials and ascended white gear to use as a base item.
The best way to get the white items is from a vendor in the fields of misery. If you go North-East until reaching the edge of the map, then explore that edge until you find her shack. It is not always open, but when it is, she usually has 1-2 different white items that can be used for crafting, and there is no limit to how many you can purchase. This is by far the best way to get 20 pairs of (whatever item you need) as opposed to praying they drop from mobs. Hope this helps you if you didn't know it was available.
TL:DR; fields of misery, north-east edge of map, vendor sells items including whites, no limit to how many you can buy!