Marauder ascended aqua breather?
Contact support. They’ll probably be able to get you the item you want in exchange for you removing the relevant mats, including the insignia.
John Smith: “you should kill monsters, because killing monsters is awesome.”
I would say your best bet would be to get the aquabreather from bitterfrost frontier (if you have that chapter/zone unlocked) and just save the insignia for later.
‘Death smiles at us all. All a man can do is smile back.’