Since it is a Diageo brand (Guinness parent company) it's distributed by the Monmouth county Miller-Heineken-Guinness wholesaler, Point Pleasant. http://www.ppdbeer.com/brands/diageo/...
As such, any liquor store in the county that carries those brands (that is to say, EVERY liquor store) can order Kaliber - and I'd guess many already do stock it since there aren't many NA's on the market. In addition, being a non-alcoholic beer, it is also often stocked by supermarkets in their "misc beverages" section.
Beer wholesaler don't deal directly with the public, so are often decidedly "un-consumer friendly" but sometimes you can get lucky with a phone call and get someone who'll direct you to one of their retailers who has what you're looking for in stock already- so you could try calling Point Pleasant Distributors, too.