The one for the .40/.45 is too wide. You could probably find one but that'd be a lot of trial & error. I just got my Fobus holster today. I love it! It holds the gun very securely but it's easily drawn. I definitely recommend getting one!
The retention in the Fobus is friction and tension in the area of the trigger guard. No other catches or latches. The newer Evolution models for the JHP/JCP have adjustable tension, the older one's like for the C9/.380 do not. I have one of each, and like the newer model better, so I wish they would make one for the C9.