Unless there's an overseas retailer that will agree to ship to you, I'm afraid you're out of luck. For a couple of years now it's been illegal to sell any juices specifically to Arkansas residents without an Arkansas license. Because most don't want to bother or there's too many hoops, they don't ship here.
You'll also find that some won't ship hardware anymore either because they can't/don't want to separate out the juice sales from the hardware sales in their cart software.
As Furby mentioned, your best bet is to take a trip to whichever neighboring state is easiest to access. I hear that business is booming across the lines in New Hampshire and Connecticut with plenty of MA license plates in the parking lots.