Hi
You may already know this but,the 32nd texas cav was also known as th 15 th.My great great grandfather enlisted in company D at camp Crump.His service record points that out.In the Tex. Sons of confederate vets web site they have texas confederate flags, the last one on that page is thought to be the 6th and the 15th reg. flag thats all I've found so far.
Good Luck Gene