Don't know whether you are considering having the fish delivered to you or picking them up yourself...or what you consider "near Austin". Todd Overton, www.overtonfisheries.com , is about 3 hours from Austin and would be a good place for you to start. Todd is a regular on this board and good guy to deal with. I have picked up fish from him a couple of times and have been very pleased.
You live near Austin , the 1 and half drive to giddings sraight down 290. At Larry`s fish farm. call 979-542-6245 should have everything you need!!!!! Albino channels to bass to grass carp, etc, etc.