Added internal billing NBE email for external products

application/Product/Product.php

@@ -1,6 +1,7 @@
 <?php
 
 class Product extends mfBaseModel {
+  private $owner;
   private $productgroup;
   private $producttech;
   private $sla;
@@ -45,6 +46,12 @@ class Product extends mfBaseModel {
   public function getProperty($name) {
     if($this->$name == null) {
       
+      if($name == "owner") {
+        if(!$this->external_id) return null;
+        $this->owner = new Address($this->external_id);
+        return $this->owner;
+      }
+      
       if($name == "networks") {
         $this->networks = [];
         $productNetworks = ProductNetworkModel::search(['product_id' => $this->id]);