Try "mageroyal" in the search box to the left - it will tell you all the zones where it can be found with maps of their spawn points.
On my main, I got most of itin Loch Modan, but slowly - at the time, my level was too low for the Wetlands though. On a second character, however, I found a surprising amount in Teldrassil, which was much easier to travel through without dying!