There are many graves with VA markers for 2nd Texas Volunteer Infantry located at Washington Cemetery and Glenwood Cemetery. Both are next to each other in Houston on Washington Ave. Go to the find-a-grave website for photos and information.
You can also try www.glenwoodcemetery.org
or
Glenwood Cemetery
2525 Washington Avenue
Houston, Texas 77007
713.864.7886
Good luck in your search.