Some mods are already offering "armor stands".
Basically scripted NPCs with or without AI on them which stay in place.
Control can be via dialogue or via messagebox.
In Oblivion one needs to premake these NPCs for safe handling.
In Fallout one can use placeatme to place and disable, markfordelete to remove them, preferrably after removing the player's items to the player.
It should not be so far from reality in New Vegas to see these.
Clothing merchants would definately look more like sellers of Clothes with them.