If you are in the volcano area, stop at the Volcano Winery. Do the wine-tasting, and then buy! We bought macademia nut and guava wine. They are both delicious. The prices are steep, but these wines are a novelty. They pack the bottles for you in heavy Styrofoam packs, which you can check in with your luggage and they won't break!
Their phone number is 808/967-7772, and their website is at www.volcanowinery.com.