What records that are extant are for the most part in the Texas State Archives. There are folders for each brigade, but a significant amount of these records were destroyed when the old capitol building burned. There are some muster rolls, but they are fragile, and have not been accessible until a filming program is completed. I haven't checked on them in a year or so, so some might be available.

It will probably take a trip to Austin, and sadly, you probably will not be able to find a great deal.