Does anyone know of a company that makes a packaged heat pump system having the air return on the right side and the discharge on the left side when viewed from outside the house? I'm replacing a 1973 Sears Gaspac which is configured that way and it would make it easier to connect with the existing ductwork. The new systems I've looked at are configured the opposite way. If not, is there any type of pre-fabricated crossover available that would accomplish this without extensive ductwork changes? Thanks for any help.