There isn't a Triumph dealer on the Big Island. I lived on the Big Island for 5 years from the late 80's - early 90's. Shipping between the Islands wasn't very much back then and only took a few days. I would suggest calling the dealer on Oahu 808-671-6711. Tell them what you are looking for, maybe they would keep their eye out for a used Triumph or maybe they would have something in stock you could purchase. Used would definitely be the way to go for a 5 month ownership. You could also check the Hilo or Kona newspaper classifieds online. If you could get your bike to great falls before you left I could store it free of charge in my Garage (look good parked next to my speedy)