Multiple places. You get it for certain rewards, you can buy it in the Clan store and by killings Ubers. 

Not prone to attacking ubers,been a while since I did,so out of practice.

Yesterday I figured it might be worthwhile, not so much as I didn't quite get the competition level I had hoped for. What dropped was mainly a load of rubbish, not what I had anticipated  and not very useful to my game. 

Addition below.

Drops were mostly task refreshers, relocations, peace treaties ,bronze, and sundries.

I shall have to see if this is the position now,or player specific in some way,

If you meant me,that's not going to help.

I was offered this ages ago, and I was also in an advanced clan with much oher gear available.

In order to craft better gear, you need other,basic gear first.Oh and gazillions of silver neither of which I had, still don't.