Nice to see this xeric plant promoted, they have become incredibly popular in the Phoenix area - because they are as beautiful as they are tough. We have them planted on the highways here, which is no place for much other than rocks to survive, but they do.
Now, if we could just get the landscapers to stop trying to form them into little balls and boxes.... grrr....
Here is a link to a Phoenix wholesale nursery that grows a number of Leucophyllum cultivars and species.
http://www.mswn.com/plants/dat...
They grow Lynn's Legacy (another name for the same cultivar, as noted on their info sheet) If you look at the top navigation bar, they give a list of their of retail outlets, some of which are in Texas.
For those of you who are interested in this plant and live in a wetter area than recommended, you might want to try the
Leucophyllum langmaniae 'Compacta' which is said to tolerate more water than the typical Leucophyllum. I have two of them, along with a couple of "Green Cloud"s, and a whole bunch of the "Rio Bravo" type, which I haven't seen bloom yet.