Does anyone know where I can buy pre-chilled crocus bulbs in the greater Cleveland, Ohio, area?
I don't think you will find such a dealer.....since there is no reason to stock such an item. In zone 5, there is ample time for a bulb, properly planted when it should be, to be purchased at the stores that stock them.
To buy a pre-chilled bulb is supposing the dealer has refrigerator appliances to keep the bulbs at a certain temperature and have them ready for sale at a specified time.
Pre-chilled bulbs are available in those regions where normally autumn temperatures do not fall below specified parameters for the different bulbs.
Move to California or Georgia and you will find pre-chilled bulbs available when bulb time comes around.