Finally hit 30 with WVR today..not quite done yet but I should have enough Webs to carry me through.

At Quarrymill there's a level 25 Levequest, I forget what it's called, but they ask you to make "Initiate's Slops" (http://xivdb.com/?recipe/539/Initiate's-Slops).

I just made about 25 of these (I had a lot of levequests banked for such situations) and I got 11 Diremite Web from every turn-in except for 2. Maybe I just had good luck, but I'm now sitting at level 30 with nearly 200 Web left.

I still have a lot to go for the 750 synth achievement at this bracket, but that can wait until I'm 50 and wealthier to get the Web I need for that.

Hope that helps someone!