[HELP] Netherweave Bandage unlearnable, cannot advance First Aid!

As the title suggests, I cannot go further in my first aid, because the ability for me to learn or purchase the skill Netherweave Bandage has been removed from the game somehow. I'm Horde which means the book is sold in Outland at Falcon Watch in HFP, yet the [Medic] there only sells the heavy version. No trainer, not even the ones in Dalaran can let me learn the skill and the item isn't found on the auction house to buy either.

Is there some ******ed Warmane twist I'm not aware of to get my First Aid skill higher? I'm currently the only player in the game who can't go further now because hey fk it, let's have a huge bug and no game mods have even been remotely understanding or helpful.

Please help me, I PvP a lot and not being able to bandage is actually the worst.