I have almost everything I need and a little more (gunerangs, flakers, etc). All farmed or spontaneously droped. Except the Norfleet. No luck (or skill) with the big insect. But I know what is my problem - I had a boss called Norfleet, once, kind of trauma.
"You can't always get what you want" (Dr. House, quoting another guy, I guess)
Hyperius can also drop them if you rather give him a go.
Proud to say 79 all farmed on my own. no trades or dupes. There are only 2 legendaries I don't have any variation of. The invader and the thunderball fists. Working on those now. Also still working on a level 50 Infinity. Highest I have is a 42. I must thank Pete for 60% of my stuff.
I payed for this game, so I play this game the way I want.