Is there a professional Sledge Hockey League?

I was at work today (at an ice rink) and I saw a bunch of guys playing Sledge Hockey, it was just a practice but I found it to be a really interesting sport and I want to go watch the game actually being played. So I'm planning on watching the Paralympics to see Sledge Hockey, but I want to know if there is a professional Sledge Hockey league and where do they play? I'm living in Ontario, in the GTA in specific so hopefully theres a professional team I can watch in my general area? Or if not maybe a really good minor league team I could check out?