Zitrusgaertner, thank you for your info. It was hard to find, and I have tried even Amazon, Ebay, but none of them had any clue about this citrangequat. I did not realize that it would take 20 year to fruit; however, I only need their leaves for cooking and blending medicine, most citrus fruits can be bought from most stores in US but not leaves.
Thank you for your kindness, I will try to search else where to see if I can order a tree, if not I still love to have a seed to try in my area (Atlanta, zone 7b).