Can't speak for the Fastenal in the West end of Ottawa, but whom I presume to be the "manager" of the East end location (Industrial) is not cool in my opinion (apparently customers are expected to pay for their mistakes).

That being said, there are piles of plastics places around Ottawa, Laird Platics, another big one on Industrial Avenue (they distribute to the other guys- i.e. Fastenal, Laird and such).