As far as I know, Like votecthulhu said, the WoR is the support MS has. I just returned from the one in Hope Springs, OH. It was the most pivotal thing so far in my recovery!
Just left therapy and she is just amazed at how far I've come since my LONG drive to Ohio! It helped me TREMENDOUSLY!
I would also check 1n6.org and snapnetwork.org for those abused by priests. You can also check RAINN and the crisis lines. But for specifically male sexual trauma, your at the place in my opinion!
Welcome, reachout to your local chapter of support. I wished there was something here! I'm in the process of creating(?) a support group here!
All the luck in the world to you! Your on the right path! Stay the course!
Keep healing. It's worth the journey!