We haul a case back each time we go (providing that the duty free shop is stocked).
Get to know some of the board members and see if anyone would be willing to bring a case back for you. It might be hard to arrange shipping from them to you, but worth the risk since it IS Belikin on the line.
Last time DenverDan went, they brought some back for the CCACAS (Colorado Chapter of the Ambergis Caye Appreciation Society) party in July. Other than that, it's been a year since we've had our fix.