Get into activities that bring you around muscular women. Get into bodybuilding, powerlifting, CrossFit or some other strength sport and join a dedicated hardcore gym. Get serious into it (no dicking around the gym,) and get involved with your local fitness community and be friendly towards both the men and women. Let people know that you are friendly and approachable. Compete and attend competitions as a spectator and use them as networking opportunities.
Basically, if you want a buff woman, you gotta put in the work.