I get some seed from my local extension. The cost is $1 a packet and they are varieties bred for my climate. I get tropical corn, Kai choy cabbage, Jalapeno (Wailua), Hawaiian chilli, and eggplant. They do have low bearing papaya and GMO papaya (ringspot resistant only if you watch the video and sign the agreement).
Most of my Asian vegetables come from a local supplier or from Kitazawa Seeds
Other seeds come from Pumpkin Nook (Ferry Morse seeds), Baker seeds, Johnny's, High Mowing (organic), territorial, Tomato growers supply and bean and pea inoculant from Burpee.
I also save many seeds from my garden and people give me seeds and cuttings.