INDIGO.IndiGo, which is operated by InterGlobe Aviation, is sourcing 4 Airbus A321ceo aircraft, each of which will be converted from passenger JETS to a FULL freighter configuration.A letter of intent has been signed with a lessor for 2 aircraft already and IndiGo expects to reach an agreement for the next two shortly.The INITIATIVE will make the best use of the natural synergies that IndiGo offers.