I am fairly sure there are no other mutation testing plugins for sonar.
I've not actually tried the pit sonar plugin myself, but I understand the issue with maven 3 can be worked around
see
https://groups.google.com/forum/?fromgroups=#!topic/pitusers/bkDD13iBtHU
The PIT maven plugin itself is quite mature and is being used successfully in production. If you encounter issues with the sonar plugin you could just publish the maven reports from your CI server.
Please do feedback any issues you hit - I'm sure Alexandre will be kean to fix them.