firestorm

I'm about to turn 21 and want to buy a handgun that I can ccw under a t-shirt. Right now I'm kinda leaning towards the Firestorm, even though the Shield is 9mm and basically the same size which makes it a little more practical. Also I'm in California so I have to get something on the roster...

Anyone know where I can get replacement grips for a Firestorm Mini Compact 45? Are there any "universal" grips that would work? Replacement grips don't have to be original. Thanks!