I don't think they usually have turtles, but calling is the best way to check. If they don't, consider calling Tropical Hut, a reptile +aquatic specialty pet store off of Division and 39th. Turtles are very tricky animals to care for well, and usually get much larger than people anticipate. This leads to a high rate of turn-over, neglect, or 'releasing' into the local pond. This in turn makes many small pet stores hesitant to carry them.
I believe they do, but you should call them to make sure.
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