Tee, I usually buy my native plants from a wonderful Redland City establishment called Indigiscapes. It has a huge native plant sale once a month. No more than $2.50 a pot. It is an excellent local government initiative.
http://indigiscapes.redland.ql...
But I just noticed that the Native Violet is supposed to be common on the island (after you mentioned the possibility). I will try and get some. My garden is a bit bare at the moment because I have had the yearly 'weed out the mint' attempt (sigh) and it would be good to get a ground cover going.