Where to find gold Etched Sword?

I have been searching for etched sword drops, and haven't got any luck.

Is collector's only way to obtain an Etched Sword?
Where can I find a gold Etched Sword drop?

dont remember for sure, but ive found a few blue ones

I'm quite surprised that people don't check guildwiki before asking questions.. >.>

http://gw.gamewikis.org/wiki/Etched_Sword

thats not true at all, i know for a fact ive found white+blue ones

Yeah, me too.

But why get a gold/blue/purp one when you can get one from a collector already with the 15>50. Unless of course you want to use it as a caster weapon, then good luck finding one because no one has cited where he/she has found one.
http://wiki.guildwars.com/wiki/Etched_Sword

I went with the official wiki.... and yes, i am looking for caster mods.

wish i could remember where i found them, but really low damage white+blue ones for sure just following the eye of the north primaries