Warrior helms @ collector

Hello, can someone help me? I need these helms and i dont know where to find them.

Brutes, Duelists, Dwarven, Executioners.

Ty in advance, Manfy.

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Also, collectors in all parts of Tyria have parts of armors, helmets also I suppose, but before Desert its not max armor.

Duelists helm can be found at the Amnoon Oasis for 5 bleached shells.

Stats are

80(20 vs. physical)
+1 to swords

Hope this helps

Where do bleached shells come from anyway?

Sand Wurms. I had the best luck buying them at Thirsty River. I paid 1k per for them back in the day, though I don't know how much they usually go for, especially now. It's a lot quicker than trying to actually earn them from drops since wurms suck for loot.

o.O Tulkas you are the man... thats what i need, thanks a lot man