One off my bucket list, we visited the Narangba Nursery which is run by a young couple and they are doing a good job. They have their own tissue culture bananas and quite a few exotic and native plants on hand. This Syzygium is known as the rose apple, a bright red watery fruit which is mostly seedless.
The tree has been thoroughly researched for it's medicinal qualities, maybe this is why the islander people love to have this tree.
This picture is borrowed from the Australian Tropical Rainforest Plants website.