You should search the lawyers on Avvo that handle defamation cases or you can google defamation lawyer in your state and call a few until one is willing to take the case on contingency.
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You don't say enough about your case to know whether this applies, but you should be aware that Texas has recently enacted anti-SLAPP legislation, the Texas Citizens Participation Act, which is effective now. (See http://www.citmedialaw.org/legal-guide/anti-slapp-law-texas )
You should immediately consult a Texas attorney to determine whether your lawsuit may run afoul of the new Texas anti-SLAPP law. If so, you should either dismiss or amend to fix that problem.
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