Shared Models between multiple applications

I finally got this to work.
What I did was to create a SHARED_PATH constant in Common.php

PHP Code:

$d = explode(DIRECTORY_SEPARATOR,ROOTPATH);
$d[count($d) -2] = "shared";

define('SHARED_PATH' , implode(DIRECTORY_SEPARATOR, $d)); 


Then use the SHARED_PATH in my Config/Autoload.php

PHP Code:

public $psr4 = [
        APP_NAMESPACE => APPPATH, // For custom app namespace
        'Config'      => APPPATH . 'Config',
        'Shared' =>  SHARED_PATH
]; 


Then in the my Controller I simply use the shared model

PHP Code:

use Shared\Models\OrderModel; 


OR

PHP Code:

$orderModel = new \Shared\Models\OrderModel(); 


Hope this helps someone.