Вывести в корзину количество товара на складе - JoomShopping

<?php foreach ($this->products as $key_id => $prod) {
$product = JSFactory::getTable('product', 'jshop');
$product->load($prod['product_id']);
$prod_qty_stock=getDataProductQtyInStock($product);
?>
...
<input readonly type="text" price="<?php print $prod['price']; ?>" name="quantity[<?php print $key_id ?>]" value="<?php print $prod['quantity'] ?>" stock="<?php print $prod_qty_stock['qty'];?>"/>