@Account Closed
Since, in Texas, there is no availability of the lien to the public for purchase, it may seem that you are asking for information that would violate the privacy of a debtor in transaction in which you have no discernable interest. Second, the county will spend significant effort trying to verify the owner who actually owes the taxes only when they are preparing a suit. The raw list might disparage a person by listing them when they in fact are not responsible for the taxes.
Also, a list of properties that are only delinquent and not in a judicial action really has little value to investors looking for motivated sellers as these folks are not motivated until the county is about to sell their property. This may be 2-3 years after the taxes are actually due.
I suspect you would find a better return on your effort looking elsewhere. For example, you might want to watch the district court filings and take action when a new tax case is filed.