Here in NY bed bath & beyond sells a variety of health & beauty products. It is like CVS inside BB&B. You can use your 20% off coupons in the store. I am not sure if they sell the CBE but you should check into it.....maybe get a discount.
I am not sure if they sell that. I do know that they sell the sticks you pee on...so maybe they do have CBE, or atleast the refills.
Good Luck using it!!!