Any "must see" bonsai related shops or gardens on Maui?

Fairly soon my family and I will be flying to Maui to attend a wedding. It turns out we will be on a direct flight to Maui, and will not have an opportunity this trip to visit other islands. We will be spending a week there and will have access to our own transportation.

As bonsai is one of my major hobbies and interests, my family is used to nursery crawls and visiting folk with "those cool little trees". So, besides attending the wedding, doing some tourist stuff our new relatives recommend, I'd like to see if anyone might suggest any shops/gardens on Maui? I am sure just visiting there will be fantastic, but as I will likely seldom travel there again, it would be nice to try to hit any "must sees" while I am there.

Any suggestions are very welcome.