Do you have a referral from a mental health professional or are you trying to go the informed consent route?
If you have a referral/have done therapy, I would scroll through this page from Rutgers and contact the nearest therapist to you. Ask them who/where they refer their trans patients for HRT.
http://lgbt.newark.rutgers.edu/medicalreferralIf you are looking to go the informed consent route, you could call the Mazzoni Center in Philadelphia and try to get on their calendar. I imagine they will probably have a bit of a wait, so I would call there first as long as you're able to get to Philly. You could also try Callen Lorde in NYC, though I'm not sure they're working with anyone outside of NYC. Doesn't hurt to try though.
If traveling is an issue for you, you could call and check with local Planned Parenthood locations. Some PP's do HRT, some don't, so you'd have to call each specific location and ask.