From the few folks from HI that have posted on here, finding an actual moped on Hawaii is very difficult as scooters have been the mode of transpo for the last 25 years.
If I was moving to HI, I would just as soon import a modern Dio 2t and forget about mopeds altogether.
Lia (Raven Shining [?]) posts occasionally about mopeds in HI. Might be good to look through some of her struggles.