It is not avaiable online, i have a copy :). Can send u the link. PM me your email, size is 4.8 MB.Just copy into your android device, allow installation from unknown sources, open the apk file and there u go. There will be two maps in your device, one will be cracked and also navigation & places will be added(maps will be yellowish with blue dots).
Now open this maps and select any destination, it will ask you need directions or navigation. select navigation, it will ask which navigation service, select google navigation and here you will have navigation with voice guidance. For destination selection you can search place or select any point on map by long pressing on it.
Please note once you install it will ask for google account authorization, u can allow or deny, in both cases it will work.