Er...77W has an exclusive GE offering.
Exactly. If you could prove to Boeing that you could get a fully loaded 77W off the LBA runway with a new series of RR engines I am sure they would reconsider their position with GE!
Anyway, I would be surprised if LBA got MAN's services to Pakistan. I don't know what the passenger figures are from MAN-Pakistan but surely they can hold A310s at least from both MAN and LBA.
Also, EK operate the 77W non-stop from DXB to JFK, can PIA not do the same with theirs or is the few '000 mile difference too big a difference?