The best way to find a doctor who dispenses Suboxone or Subutex is to go to those brand's websites and look for provider in your area. Good luck.
Are you sure you want to go the subutex route? It is addictive and eventually you'll have to get off that too. Also, am wondering why you want subutex rather than suboxone--I understand the former can be shot up while the latter cannot. Only certain doctors can prescribe suboxone/subutex--you can find a provider by googling it.
In my view, you would be much better off going with naltrexone/Vivtrol. It blocks all the opiate receptors and is not addictive, unlike suboxone. It can be hard to find a provider for Vivitrol. The company does have a list of providers, but any doctor can prescribe with some bother. Naltrexone pills are much cheaper, but you have to take it every day. Because it is not addictive, there is no self-re-enforcing mechanism to take it every day. This is why the monthly Vivitrol injections are preferred.