last June, i bought my wife a lei from one of the shops near the baggage claim area. it was reasonably priced, they had a nice selection, the ladies were friendly, and it lasted the entire week.

i think this is a great option. once you get off the plane. you probably want to freshen up anyway. plus you can "surprise" someone by buying it for them when they're busy (going to bathroom, waiting for luggage, etc.), and slipping it on as you are finally leaving the h*** of the airport (and the hours of flight) and starting your adventure on the big island.