Ya pude, la solución fué copìar las llamadas de la base de datos del account order details.php al ro_basket_b2c.html.php
Código PHP:
$db =& new ps_DB;
$q = "SELECT * FROM `#__{vm}_orders` WHERE ";
$q .= "#__{vm}_orders.user_id='" . $auth["user_id"] . "' ";
$q .= "AND #__{vm}_orders.order_id='$order_id'";
$db->query($q);
$dbbt = new ps_DB;
$q = "SELECT * FROM `#__{vm}_order_user_info` WHERE order_id='" . $db->f("order_id") . "' ORDER BY address_type ASC";
$dbbt->query($q);
$dbbt->next_record();
$user = $dbbt->record;