You could probably contact the Houston Bonsai Society for recommendations:
http://www.houstonbonsai.com/
used to be the website but it appears to be down.
In part it did list the meetings:
If time allows, you might even attend a meeting. The group meets the first Wednesday of every month at the Houston Garden Center. 1500 Herman Park Drive, next to the Houston Museum of Natural Science. The social gathering starts at 7:00 p.m. and the meeting begins at 7:30 p.m. Visitors welcome.
And a contact name:
esh@birkman.com
Regards,
Matt