No, the manufacturers stay alive by keeping orders as constant as possible. They aren't going to make their workers sit around doing nothing to make a delivery more convenient to you. When they don't receive orders, they have to close down within a matter of months. There is no room to wait.
All you can do to push orders back is cancel them and resubmit the order, provided the aircraft has either been launched or the there are other orders on the books. Also note that later orders will have higher costs for both purchase and lease.