OEM alarm into 07 3S HB?

Guys, 

Okay, so it's got an immobilizer and keyless entry.  But is it possible to install a factory anti-theft unit into an 07 3S HB?  If so, where does one procure the needed modules?  I also plan to install a module that locks the doors when the ignition is switched on since this is my wife's car.

Any info?

Thanks,

Yuk Foo

sure it can be done, but with cost and hard to find parts may just be easier to just put in aftermarket like a viper.