Actually I'm fairly sure the reason you can still buy them with seals is due to the issue I ran into.
I had done my lvl 60 job quests prior to them giving them out from the job quests and am basically SOL without DOING the hunts... which is more annoying, because that would mean that if they REMOVED access through the seals, I wouldn't be able to get the gear at all since.... you apparently cant get them from the calamity salvager either