Don't know any specific locations, but I picked up a ton of it just running around Auridon. The first zones in the other factions would have it too. I'd send it to you, but unfortunately, I got rid of it all as I've outleveled it.
PC / NA Thenathra - Khajiit Stormblade (Sorcerer - Dual-wield Swords/Lightning Staff)
I would recommend starter islands - they have much more mats than zone 1.
^^^^^ This x 3.
Power level to CP160 in a week:
Where is the end game? You just played it.
Why don't I have 300+ skill points? Because you skipped content along the way.
Where is new content? Sigh.