I asked a similar question a couple of days ago. If you scroll down a few posts, you should find it. There are a couple of names given in the replies. Also there will be a plumeria sale on June 8. You can get info about the sale from this site

http://www.theplumeriasociety.org/

Hope this helps a little.

Joan

Janey, there are some incredible collectors around the Houston area who sell some of their plants through the PSA sales in June and August. Most plumeria are in bloom at that time so you can get a better idea of what you'll like versus now when they'll still be barely putting on leaves.

Paula Furtwangler, Emerson Willis, Lake and Eulas Stafford, and Barbara Randolph come immediately to mind. All very nice people with amazing plants!

If you can't wait that long, I think Buchanan's nursery will have some of Jungle Jack's varieties for sale by now.