Have you tried this link:
http://www1.va.gov/directory/guide/home.asp?isFlash=1You should be able to find a Regional office, Medical Center/clinic there. I would try calling your local Medical Center.
Also, if you find your town's .gov address you should able to find your Veterans' Service Officer, or you could personally go to your town hall, he or she should have an office and should be able to provide you with some care.
Lastly, this is the VA's website for PTSD: (which you may have found already)
http://www.ncptsd.va.gov/ncmain/index.jsp