Да бог бы с корзиной, просто сама схема не рабочая, беру к примеру контроллер модуля /catalog/controller/extension/module/so_deals.php шаблона, вставляю после модели код, потом вывожу в шаблоне {{ upc }}, результат нулевой.
$data['product_features'][] = array(
'product_id' => $product_info['product_id'],
'location' => $product_info['location'],
'thumb' => $image,
'thumb2' => $image2,
'name' => $product_info['name'],
'name_maxlength' => $name,
'description' => $product_info['description'],
'description_maxlength' => $description,
'price' => $price,
'special' => $special,
'discount' => $discount,
'productNew' => $productNew,
'tax' => $tax,
'rating' => $rating,
'date_added' => $product_info['date_added'],
'model' => $product_info['model'],
'upc' => $product_info['upc'],
'quantity' => $product_info['quantity'],
'href' => $this->url->link('product/product', 'product_id=' . $product_info['product_id']),
'specialPriceToDate' => $specialPriceToDate,
'category_info' => $category_info,
);