Your car most likely has 10" brakes. I don't know any shops down that way, I'm like 4 hours away. Drum brakes are relatively easy to work on, diagnosing the booster might be another. Like said any corner mechanic should be able to work on it, problem is most just want to swap out parts and replacement drums can be difficult to locate so yours might need to turned if there is life left and there is someone that can do it.