It is harder to find on major US platforms, though some Caribbean specialty stores like Bread & Butter Express list it. What Makes J.B. Unique? Charley's J.B. Overproof Jamaican White Rum – Review
It is readily available in local supermarkets like Loshusan and Fedlin for roughly J$3,255 (~$21 USD) for a 750ml bottle. jb rum buy
You can reserve it online to pick up at Jamaica Duty Free at the airport for around $18 USD . Online (International): It is harder to find on major US