Kimbobwee is correct .............. MegaMart has a separate liquor department carrying all or most of the items you were interested in. The rest of the store is like Costco with racks and racks of products including Diet Cranberry, wide variety of beer, soda, etc.... Also a nice selection of bakery items, fresh food, frozen foods, household goods, and on and on.

You can bring in some of the higher end liquors in your checked luggage just in case you can not find your required brands in Jamaica. We usually repackage our favorites that come in glass bottles into empty liter plastic soda bottles (and put them inside of a gallon ziplock bag) to avoid the repeat of a unpleasant surprise of a broken bottle upon arrival.