Find My iPhone/imac leapord?

Hey, Im a heavy Apple product user and ive set up Find My iPhone/iMac. on my iphones ipads and imacs.

But on my Macbook Pro its running Leopard and i want to set up Find My Iphone/imac on it. cant seem to find it as it was relised with lion, is there any apps for it?

Thanks.

-Kez