http://clinicaltrials.gov/ct2/search/index
Follow the link and use the search to find a trial in your area that fits your needs
http://clinicaltrials.gov/ct2/results/map/click?term=hepatitis+c+AND+texas&recr=Open&cond=%22Hepatitis+C%22&map=NA%3AUS&map.x=304&map.y=290
This link will show you all the active trials in Texas, you will have to open up each trial to see if they fit your needs and location, if you find one you like the contact info will be there as well
You can do a search for studies here:
http://www.clinicaltrials.gov/
Just type in HCV and Texas where it states search for studies.