Keyless entry system for a Yaris?

I just bought a Yaris 4dr but spent the keyless entry with alarm, etc. offered by the vendor. Does anyone know how to install or where to get a keyless entry system installed in a Yaris? I'm talking about general or universal systems you can buy at Autozone Stores, etc

If you have not bought the alarm system definelty we can get one cheap at a stereo shop or in an electronics store. If the Yaris has central locking will be less expensive. If your manual locks all the doors that have to install door lock actuators on each door which is expensive but worth it. Try Circuit City or Best Buy. Well actually remote Viper alarm alerts you if someone has messed with your car. A bond that can also get motor ignition key without which it is quite ingenious.

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