I have been told there are only 3 sleeks for each type possible at a time. Is this true?

And, for a newish players, a more important question: what happens if the character is killed while carrying all three? If an enemy loots all three of those wands, is it then impossible to for the character to get more? What happens if the enemy logs out and doesn't come back for a week or two, or gives them to a low level ally who does the same?