A guide to northern cloth scavenging / Cure Poison druid quest

A guide to northern cloth scavenging no longer seems to be obtainable after you have faction changed and re-learned Tailoring on your character. Been like this for more than a year from my experience. Any solution to this?

The second thing I'd appreciate the help with is the druid quest that allows you to learn Cure Poison spell. As a level 80 I don't have it in the spellbook and I tried getting the starting quest of a chain but its just not there (which should be Lessons Anew). Could it also be bugged due to the fact I changed faction while having "Horde side" quests running?

Any help is much appreciated!