Pride Online most certainly does have what you are looking for!
Go to Resource Center, then you will see Directories. It opens in a PDF so you will have to use the Search function to search for Texas schools.
And, after reading the thread on Alumnae Associations, you may want to rephrase your question to "collegiate" chapters - your Texas alumnae chapters are extremely active, too!!
(I'll step off my soap-box now.)