I am just curious, does anyone know if the executioner's (from the intro) clothes are available to buy or steal? Thought they looked pretty interesting. Anyone know?

I found an apparel item called the executioner's hood, which is basically a full black face mask that looks impossible to see through. I find it humorous and creepy somewhat. I found it in the Dark Brotherhood introduction quest.

Where did you find the hood specifically?

You can get it if you kill the executioner in Solitude and loot it off him.

Ah ok thanks guys.