You might wish to talk with this fellow, as he's done extensive research on Trans-Mississippi, Confederate uniforms; particularly check out his article on Houston and San Antonio-produced items: http://www.adolphusconfederateuniforms.com/

Also, an older source, on which Adolphus based much of his research for his "Drab" article: http://www.swcwa.com/Addl__Reading/Battleshirts/The_Texas_Penitentiary_and_Textile_Production_in_the_Civil_War_Era.pdf

As far as a source for reproductions of these uniforms, I can't recommend Dan Wambaugh enough--in terms of both accuracy and quality customer service; he does great work and will get it out to you in a reasonable amount of time: http://wwandcompany.com/

John