Here is the petition in Alabama-Coushatta Tribe of Texas v. Texas:
Whether IGRA authorizes gaming on tribal lands previously governed by trust statutes that prohibited gaming, as the National Indian Gaming Commission, the Department of the Interior, and the First Circuit have concluded, or not, as the Fifth Circuit has held.
Lower court materials here.
Here are the relevant materials in Allergan Inc. v. Teva Pharmaceuticals USA Inc. (E.D. Tex.):
503 DCT Order to Produce
510 Production of Documents
517 Unopposed Motion
522 DCT Order
Here is the opinion in United States ex rel. Kennard v. Comstock Resources (E.D. Tex.): DCT Order Granting Comstock Resources Motion