Be SURE to look at your survey and ascertain if a carport is a permitted project, AND if you are in the City of Austin, you WILL have to get a permit. The contractors who have answered should be able to help you, but the permitting process might take a week or so.
I am going to have one built too. I want to find the best contractor for this. I want the carport to look as great as it can. I have some specifications for it. I will have to look into this business. http://lifestylepatios.com/brisbane/