Miners Medical in Ashley, Luzerne County (right outside of Wilkes Barre) takes patients who are on benzos and as long as the prescribing dr (assuming there is a valid script for them) signs a paper saying that he/she knows the interactions, dangers, etc of methadone and benzos, then you will have no problem being able to take both while at the clinic. Their phone number is 570-822-5145. The only catch is that they only accept medical assistance or cash. No other insurance is accepted. There is another methadone clinic in wilkes-barre run by Choices that doesn't allow benzos so don't call them on accident! There is usually a waiting list but it goes quick and medical assistance reimburses you for gas mileage or pays for your county's transportation program to give you a ride.
Hope this is the info you needed! GOOD LUCK!!