Crows Special Brew is special in that there is a limited supply. You will need to kill wait for a server restart for his supplies to replenish.
In the meantime, perhaps you will be able to drink away your sorrows with Crow's Special Brew, from
this quest.
Edit: Please note that Crow's Special Brew cannot be used to complete the related quests, you must use the purchased version, Crows Special Brew, which contains no apostrophe.